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USPTO Terms of Art — DIM to Dz

Glossary of USPTO Terms of Art

| A | B | C-CL | CM-CZ | D-DIM | DIM-DZ | E | F | G | H | I | J-K | L | M-MET | MET-MZ | N | O | P-PHA | PHE-PON | POR-PZ | Q | R | S-SEPA | SEPO-SMT | SN-STEM | STEP-SZ | T-TOG | TON-TZ | U | V | W | X-Z |

DIMER OR TRIMER OF AN ALIPHATIC MONOCARBOXYLIC ACID (CLASS 520)
Denotes dimeric or trimeric fatty acids prepared, e.g., by free radical, ionic, thermal polymerization, etc., of a monomeric fatty acid which can be saturated or unsaturated monocarboxylic acid having at least eight carbon atoms. So-called "polymeric fatty" acids in the absence of other disclosure are presumed to be a mixture of dimers and trimers of aliphatic monocarboxylic acids. Included herein are reaction products of dimers or trimers wherein the dimer or trimer structure is not destroyed. Dimers or trimers of ethylenically unsaturated aliphatic monocarboxylic acids are presumed to be unsaturated in the absence of disclosure to the contrary.

DIODE (CLASS 257)
An electronic device which has two terminals and an asymmetrical or nonlinear voltage-current characteristic.

DIODE (CLASS 330)
Refers to any electronic tube, solid element, semiconductor, barrier layer device or other current carrier means limited to two electrodes and without additional magnetic or electrostatic means to influence the current flow, and which has marked unidirectional current characteristics.

DIODE ISOLATION (CLASS 257)
A technique in which a high electrical resistance between an integrated circuit element and its substrate is achieved by surrounding the element with a reverse biased pn junction.

DIODE ISOLATION (CLASS 438)
A technique in which a high electrical resistance between an integrated circuit element and its substrate is achieved by surrounding the element with a reverse biased pn junction.

DIP (CLASS 438)
dual-in-line package

DIP (DUAL IN-LINE PACKAGE) (CLASS 438)
A chip carrier or package consisting of a plastic or ceramic body with two rows of vertical leads in which a semiconductor integrated circuit is assembled and sealed. The leads are typically inserted into a circuit board and secured by soldering.

DIP (DUAL-IN-LINE PACKAGE) (CLASS 257)
A chip carrier or package consisting of a plastic or ceramic body with two rows of vertical leads in which a semiconductor integrated circuit is assembled and sealed. The leads are typically inserted into a circuit board and secured by soldering.

DIP PEN NANOLITHOGRAPHY (CLASS 977)
Method of fabrication utilizing a scanning probe tip to draw nanostructures on surfaces.

DIPLEX FILTER (CLASS 725)
A filter having a low pass and a high pass filter that divide the frequency spectrum into two separate frequency bands that do not overlap. The diplex filter allows the placement of duplex signals onto a cable by the use of frequency division multiplexing.

DIRECT BAND GAP SEMICONDUCTOR (CLASS 257)
A semiconductor material in which an electron transition from the conduction to the valence band, or vice versa, does not require a change in crystal momentum for the electron. Gallium arsenide is a direct band gap semiconductor material.

DIRECT BAND GAP SEMICONDUCTOR (CLASS 438)
A semiconductor in which an electron transition from the conduction to the valence band, or vice versa, does not require a change in crystal momentum for electrons. Gallium arsenide is an example of a direct band gap semiconductor.

DIRECT CURRENT (CLASS 363)
Direct current includes pulsating current which is of such character as to have the characteristics of direct current (e.g., such as the output of half-wave rectifier which may be smoothed by filters to produce a substantially nonpulsating current).

DIRECT DYE (CLASS 008)
Direct dyes, also known as substantive dyes, are generally sulfonated azo compounds very similar to acid dyes in constitution, good for dyeing cellulose fibers or protein fibers.

DIRECTED MOLECULAR EVOLUTION (CLASS 506)
Directed molecular evolution is a process for enriching a library in members having a property or activity of interest. Directed molecular evolution involves cycles of taking a library, subjecting it to a screen to select for the desired property or activity, and amplifying the "hits" to provide the starting library for the subsequent cycle. "Mutations" may be introduced at the amplification stage in order to increase the diversity of the library. This subject matter involves aspects of creating and screening libraries.

DIRECTLY HEATED CATHODE OR FILAMENTARY CATHODE (CLASS 330)
A filament designed to have its terminals connected to a source of current, the filament being heated by the current passing through it and effective to emit electrons, designed to serve as a cathode of an electronic tube as defined above.

DIRECTLY HEATED CATHODE: (CLASS 313)
A filament designed to have its terminals connected to a source of current, the filament being heated by the current passing through it.

DIRECTOR (CLASS 343)
A conductive (usually metallic) structure (e.g., a rod) which reradiates into free space impinging electromagnetic radiation (waves) coming from or going to the active antenna, the velocity of the reradiated wave having a component in the direction of velocity of the impinging wave, thereby to modify the radiation pattern of the active antenna, there being no significant potential relationship between the active antenna and the conductive structure.

DISASSEMBLY (CLASS 029)
The physical act of or means for dissociating, disengaging, and/or taking apart of machines, devices, and things (articles).

DISAZO (CLASS 008)
Disazo for the purpose of this class is define d as a compound containing two or more azo (-N=N-) groups.

DISCHARGE (CLASS 320)
The act of removing available electrical energy from storage in a battery, cell, or capacitor via flow of electric current from the battery or capacitor to a load.

DISCHARGE ASSISTANT (CLASS 221)
Any means (other than the weight of the article alone) which affirmatively segregates, separates or moves an article from a supply to a point of egress. All of the supply less one article may be moved to leave a segregated or separated article in discharge position or subject to further manipulation.

DISCHARGE CIRCUIT (CLASS 320)
An electrical device or path which allows flow of electrical current from a battery or capacitor to an electrical load, especially that path or device that controls or regulates said flow.

DISCHARGE CONTROL DEVICE (CLASS 315)
Any means associated with the discharge device (for example only, an electromagnet, a control grid or an auxiliary discharge electrode) intended to be used to control or influence the discharge between the principal electrodes of the discharge device.

DISCHARGE CONTROL ELECTRODE (CLASS 315)
Any electrode which is designed to influence or control the discharge between the principal electrodes. It may be a control grid or an auxiliary discharge electrode. It may depend for its effect on either its electro-static effect or on the current flow thereto.

DISCHARGE MEANS (CLASS 221)
Any means which either (1) affirmatively segregates, separates or moves an article from a supply to a point of egress or (2) permits separation or segregation of articles by gravitational movement thereof. A discharge means may be either a discharge assistant or a releaser.

DISCHARGE MODIFIER (CLASS 239)
Any means which changes the characteristic of the fluid leaving the terminus as by whirling, deflecting, removing, or quieting turbulence, etc.

DISCHARGE PATH (CLASS 330)
The path of the free electrical charge carrier particles between the electrodes of an electronic tube.

DISCHARGING (CLASS 373)
The function of removing a charge from a furnace.

DISCRETE CIRCUIT (CLASS 257)
A circuit which has an individual identity and which is fabricated prior to installation, or is separately packaged and is not part of an integrated circuit.

DISCRETE ELECTRICAL SIGNAL (CLASS 708)
Discontinuous signals which can assume only a finite number of states.

DISJOIN (DISJOINING) (CLASS 099)
These expressions are used to indicate that one portion of a naturally occurring article of food is detached or disunited from an immediately adjacent portion of the food without necessarily being spatially separated to a significant extent. For example: rolling, with some slight pressure, a hard-boiled fowl egg will disunite at least part of the bond between the outer shell* and the interior of the egg; however, unless the shell is totally removed, the membrane between the shell and the interior egg portions keeps the shell attached. Thus, at least portions of the shell have been disjoined from the inner portions although the same, or other portions of the shell, have not been spatially separated from the inner portions.

DISLOCATION (CLASS 257)
A region in a crystal in which the atoms are not arranged in a perfect lattice-like structure. See CRYSTAL DEFECT for examples of crystal defects/dislocations.

DISLOCATION (CLASS 438)
A line defect in a crystal, either of the edge type or screw type, in which the atoms are not arranged in a perfect latticelike structure. See CRYSTAL DEFECT for other examples of crystalline defects.

DISORDERED (CLASS 438)
Crystalline arrangement in which the different constituent atoms of a compound semiconductor randomly occupy lattice sites.

DISPARATE ARTICLE (CLASS 052)
An article which does not form an essential component of a building construction of plural components, but is in the nature of an adjunct having no essential load-bearing, supporting, joining or protective function.

DISPENSER (CLASS 141)
A mechanism which affirmatively effects or permits separation of a portion of the contents material supply thereof and discharge in a definite direction or path.

DISPENSER (CLASS 226)
(n) A device which moves material to an operative (e.g., a person who operates such device and who will use the material). (Compare with Feeder).

DISPERSE DYE (CLASS 008)
Disperse dyes are water-insoluble, neutral dyes applied to the substrate from a fine aqueous suspension, which were originally developed for use in dyeing of cellulose acetate and polyester materials.

DISPERSION (CLASS 210)
A mixture of a liquid with an insoluble material in very fine subdivision almost but not quite a true solution.

DISPLACEMENT REACTION FOR METALS (CLASS 075)
In the reaction A + BC = AC + B, the metal A, being more positive than the metal B, is oxidized. The displacement series or electromotive series for metals in decreasing order of their negative potentials is: (negative) Vanadium (V), Tungsten (W), Molybdenum (Mo), Gold (Au), Osmium (Os), Platinum (Pt), Iridium (Ir), Tantalum (Ta), Palladium (Pd), Ruthenium (Ru), Antimony (Sb), Bismuth(Bi), Arsenic (As), Mercury (Hg), Silver (Ag), Copper (Cu), Titanium (Ti), Tin (Sn), Lead (Pb), Germanium (Ge), Zirconium (Zr), Cerium (Ce), Nickel (Ni), Cobalt (Co), Thallium (Tl), Niobium (Nb), Cadmium (Cd), Iron (Fe), Chromium (Cr), Zinc (Zn), Manganese (Mn), Uranium (U), Gadolinium (Gd), Indium (In), Gallium (Ga), Aluminum (Al), Rare Earth Metals, Beryllium (Be), Scandium (Sc), Yttrium (Y), Magnesium (Mg), Lithium (Li), Calcium (Ca), Strontium (Sr), Barium (Ba), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs) (positive).

DISPLAY CONTROLLER (CLASS 345)
An electrical circuit which actuates a display device* in accordance with received image data*.

DISPLAY DEVICE (CLASS 345)
A communication device which converts image data* into a visual image*.

DISPLAY ELEMENT (CLASS 345)
Means for producing a visual effect in a display device* comprised of a plurality (e.g., matrix) of such means.

DISPLAY SYSTEM (CLASS 345)
A system which comprises one or more display termnals* or one or more display devices*.

DISPLAY TERMINAL (CLASS 345)
A unit which comprises at least one display device* and user interface control means (e.g., mouse).

DISPLAYED BY (CLASS 506)
A library "displayed by" a micro-organism is a library present at the surface of such a micro-organism (e.g., of a bacteria, etc.).

DISSIPATING TERMINATIONS: (FOR LONG LINES) (CLASS 333)
Networks specialized for use with and designed for connection to the end of a long line transmission line and including a resistive component for dissipating the wave energy propagated along the line and presenting an essentially resistive impedance to the line.

DISSOLVE (CLASS 352)
The gradual diminishing of the intensity of an image until it is no longer recognizable.

DISTANCE (CLASS 342)
The space between two points, which may be immediately juxtaposed or widely spaced.

DISTANCE (CLASS 343)
The space between two points, which may be immediately juxtaposed or widely spaced.

DISTANCE (CLASS 704)
A statistical measurement for comparing elements defined by variables or vectors using scalar or vector subtraction of those elements. Examples: distance=a-b, |a-b|, (a-b).5 or two vectors may be treated as objects such that the straight line distance is measured between them.

DISTILLAND (CLASS 201)
For the purpose of this class is the carbonaceous material which is undergoing a distillation operation.

DISTILLAND (CLASS 202)
The material which is undergoing a distillation operation.

DISTILLAND (CLASS 203)
For purposes of this class the liquid or liquefied material which is undergoing a distillation operation.

DISTILLATE (CLASS 201)
The liquid product condensed from vapor during the distillation operation.

DISTILLATE (CLASS 202)
The liquid product condensed from vapor during the distillation operation.

DISTILLATE (CLASS 203)
The liquid product condensed from vapor during the distillation operation.

DISTINCT (CLASS 425)
An independent entity.

DISTRIBUTED PARAMETER CHARACTERISTICS (CLASS 330)
A conductor or conductive means designed to operate at microwave or other high frequencies, so that the conductive means exhibits both distributed capacitance and distributed inductance at such frequencies.

DISTRIBUTED PARAMETER RESONATOR (CLASS 331)
A resonator of the distributed network type, the capacitance, inductance and resistance of which cannot be isolated into separate lumped capacitors, inductors or resistors and wherein the time factor of propagation of wave energy in the network is appreciable.

DISTRIBUTED PARAMETERS (CLASS 330)
When the impedance of a transmission device or line at the operating frequency or band of frequencies is due primarily to the parameters of the device or line itself, and in considering the inductance, capacitance and resistance of the device or line they must be considered as mixed together and spread out along the device or line rather than being considered as in separate discrete lumps or devices as in the case of simple series and parallel circuits, the transmission device or line may be said to have distributed parameters. Examples of circuits with distributed parameters include telephone, telegraph and power lines for high frequency energy.

DISTRIBUTED PARAMETERS (CLASS 333)
When the impedance of a transmission device or line at the operating frequency or band of frequencies is due primarily to the parameters of the device or line itself, and in considering the inductance, capacitance and resistance of the device or line they must be considered as mixed together and spread out along the device or line rather than being considered as in separate discrete lumps or devices as in the case of simple series and parallel circuits, the transmission device or line ay be said to have distributed parameters. Examples of circuits with distributed parameters include telephone, telegraph and power lines for high frequency energy.

DISTRIBUTION (CLASS 725)
A general term used, by reason of specific physical or electrical characteristics, to denote application or restriction of the modified term, or both, to that part of an electrical system used for conveying energy to the point of utilization from a source or from one or more main receiving stations.

DISTRIBUTION MEANS (CLASS 415)
At least one member positioned in the working fluid flow path and proximate to the runner to convey, guide, distribute or direct the fluid immediately prior or subsequent to its contact with the runner. Encompassed within this term is a pipe, nozzle or vane.

DISTRIBUTOR (CLASS 091)
Means which comprises or includes a part which is movable relative to the working member of a cyclically operable motor to control a motive fluid port or passage in such a manner as to cyclically control inlet and/or exhaust flow of motive fluid to or from the motor. The distributor need not entirely cut off the motive fluid flow, but may cyclically control the amount of flow (i.e., throttling).

DISTRIBUTOR (CLASS 239)
A generic term to cover all means for effecting flow modification (e.g., dispersion, broadcast, projection, or scattering, etc.) of fluid, slurries or fluent material, coming within the class definition. Means altering or adjusting the quantity of fluid being delivered through the discharge port or the character of the flow as, for example, the dispersion pattern, the droplet size, the amount of turbulence or any other control for smoothing out or disturbing the discharge. This term is used as being generic to discharge modification and to flow regulation.

DIVERSE (CLASS 425)
Differing from one another.

DIVERSE MOTOR OPERATIONS (CLASS 318)
For the purpose of classification in the subclasses entitled "plural, diverse motor operations control" the following limitations are applied relative to the nature of the several operations:

(I). Starting, stopping, or the combination of these two operations is treated as a single motor operation control. However, since mere starting or stopping is an incident to many other motor operations (such, for example, as acceleration, reversing, braking to a stop, etc. in which actual starting or stopping may take place) such mere starting and/or stopping will not be considered a motor operation control which is included in this subclass as combinable with other motor operations, unless means are provided for effecting an automatic starting and/or stopping in response to a predetermined condition. Thus, ordinary (e.g., manual) starting or stopping combined with running-speed control is not included in the plural diverse motor operations control subclasses, whereas automatic starting and stopping in response to thermal changes combined with means for causing the motor to run in either direction (reversing) is included as plural diverse motor operations control. For example; automatic opening of motor circuit at limit of travel plus simultaneously shorting the armature for dynamic braking is classified as combined braking and automatic starting and/or stopping. Likewise, automatically opening the circuit of the motor while running at an appreciable speed coupled with a braking operation simultaneously with or shortly thereafter is considered a plural operational control. The following motor operations controls are included in the plural diverse motor operations control subclasses: (a) Reversing control; (b) Acceleration control; (c) Running-speed control; (d) Braking control; (e) Motor load control, and (f) Automatic starting and/or stopping. For definitions of the various individual controls listed above see the other sections under Definitions of Motor Operation Control of this class which pertain to the several individual motor controls. The following are not included herein as combinable motor controls: (a) Phase or Power Factor Control; (b) Temperature control of the motor, including heating or cooling thereof; (c) Signalling, testing, indicating or measuring of conditions in or about the motor; (d) Ordinary or mere starting and/or stopping of the motor; (e) Phase splitting or phase conversion to adapt a motor for operation from a source of electrical supply having a different number of phases than that for which the motor is wound; and (f) Means for lubricating the motor.

DLP (CLASS 438)
double layer polysilicon

DLTS (CLASS 438)
deep level transient spectroscopy

DMAH (CLASS 438)
dimethylaluminumhydride

DMD (CLASS 438)
(a) depletion mode device (also D-mode or D-type) or (b) deformable mirror device

DMOS (CLASS 438)
double diffused MOS

DMOSFET (CLASS 257)
Depletion type metal oxide semiconductor field effect transistor. Such devices are normally in the on condition with no applied gate voltage.

DMOSFET (CLASS 438)
Depletion-type metal oxide semiconductor field effect transistor. Such devices are normally in the on condition with no applied gate voltage.

DMS (CLASS 438)
dilute magnetic semiconductor

DNRM (CLASS 523)
Designated nonreactant material (as discussed in this class definition)

DOCTOR, WIPER, OR SCRAPER (CLASS 118)
Any instrument acting on the coating or on the work for the purpose of spreading or removing surplus coating material. The instrument may be, for example, a solid scraper blade, a roller squeegee or as in the case of an "air doctor" a gaseous blast. For definitions of terms appearing in subclass titles and not mentioned in the above definitions, see the definitions to the particular subclass in which the term appears.

DOES (CLASS 438)
doublehetero optoelectronic switch

DOG (CLASS 070)
A movable blocking element, other than a tumbler, in the form of a pawl or catch, adapted to releasably detain a movable part.

DOGHOUSE (CLASS 065)
A boxlike wing on a glass furnace through which a batch or floaters, etc., are introduced into the furnace.

DONOR IMPURITY (CLASS 257)
An element which when added to a semiconductor provides unbound or free electrons to the semiconductor which may serve as current carriers. Typically, donors are atoms which have more valence electrons than the atoms of the semiconductor material into which they are introduced in small quantities as an impurity or dopant. Since such donor impurities have more valence electrons than the semiconductor, a semiconductor doped with donor impurities is an n-type semiconductor.

DONOR IMPURITY (CLASS 438)
An element which when added to a semiconductor provides unbound or free electrons to the semiconductor which may serve as current carriers. Typically, donors are atoms which have more valence electrons than the atoms of the semiconductor material into which they are introduced in small quantities as an impurity or dopant. Since such donor impurities have more valence electrons than the semiconductor, a semiconductor doped with donor impurities is an n-type semiconductor.

DONOR IMPURITY OR DONOR (CLASS 330)
A material which when added to a semiconductor in minute quantities, as an impurity, induces electron conduction, generally causing the semiconductor to become one of "N-type conductivity".

DOPANT (CLASS 117)
A desired material intentionally present in an amount insufficient to satisfy the lattice unit cell, which may be present interstitially or by occupying crystal lattice positions substitutionally.

DOPANT (CLASS 257)
An impurity added to a semiconductor material to change its electrical conductivity or other characteristics. N-type (negative) dopants, such as phosphorus, for a group IV semiconductor such as silicon typically come from group V of the periodic table. When added to silicon n-type dopants create a material that contains conduction electrons. P-type (positive) dopants, such as boron, for a group IV semiconductor such as silicon, typically come from group III and result in holes.

DOPANT (CLASS 438)
An impurity added from an external source to a material by diffusion, coating, or implanting into a substrate, such as changing the properties thereof. In semiconductor technology, an impurity may be added to a semiconductor to modify its electrical properties or to a material to produce a semiconductor having desired electrical properties. N-type (negative) dopants (e.g., such as phosphorus for a group IV semiconductor) typically come from group V of the periodic table. When added to a semiconductor, n-type dopants create a material that contains conduction electrons. P-type (positive) dopants (e.g., such as boron for a group IV semiconductor) typically come from group III and result in conduction holes (i.e., vacancies in the electron shells).

DOPING (CLASS 117)
The process of introducing a dopant* into a material.

DOPING OF SEMICONDUCTOR (CLASS 438)
Adding controlled amounts of conductivity modifying material, referred to as electrically active dopant or impurity, to a semiconductor material or to a material to produce a semiconductor having desired electrical properties for this class.

DOPING PROFILE (CLASS 257)
The point to point concentration throughout a semiconductor of an impurity atom doped into the semiconductor.

DOPING PROFILE (CLASS 438)
The point to point concentration throughout a semiconductor of an impurity atom doped into the semiconductor.

DOUBLE-DIFFUSED MOS (DMOS) (CLASS 257)
A metal oxide semiconductor having diffused junctions in which successive diffusions of different impurity types are made in the same well-defined region of the semiconductor.

DOUBLE-DIFFUSED MOS (DMOS) (CLASS 438)
A metal oxide semiconductor having diffused junctions in which successive diffusions of different impurity types are made in the same well-defined region of the semiconductor.

DOUGH (CLASS 425)
A soft semi-solid mass capable of being kneaded or of being shaped into a self-sustaining form, (e.g., clay bread dough, etc.).

DOWEL (CLASS 404)
Rod or bar reinforcement-often relatively movable with respect to road, pavement or joint components-which reinforcement bridges, links or joins adjacent components so that load, stress or movement of one component is both inhibited by, and transmitted to, another component.

DRAFT (CLASS 164)
The taper that is provided on otherwise verticle faces of a pattern to facilitate its removal from the sand mold.

DRAG (CLASS 164)
The lower or bottom section of a flask, mold, or pattern. Also referred to as nowel.

DRAIN (CLASS 257)
The electrode of a field effect transistor which receives charge carriers which pass through the transistor channel from the source electrode.

DRAIN (CLASS 438)
The electrode of a field effect transistor which receives charge carriers which pass through the transistor channel from the source electrode.

DRAIN CURRENT (CLASS 257)
The flow of charge carriers in the drain region of a field effect transistor.

DRAIN-SOURCE SATURATION CURRENT (CLASS 257)
The maximum amount of current carried by the drain of a field-effect transistor when the gate- source voltage equals zero volts.

DRAM (CLASS 438)
dynamic random-access memory

DRAW BAR (CLASS 164)
A bar used for lifting the pattern from the sand of the mold.

DRAW RING (CLASS 065)
A refractory device placed in a supply of molten glass to define an area for drawing.

DRAW SHIELD (CLASS 065)
Baffle means isolating stock being drawn from the hot atmosphere existing above a supply of molten glass.

DRAWING (CLASS 065)
Forming stock, generally sheet or tube, by utilizing the self-cohesiveness of glass in a plastic condition to effect an operation similar to a "taffy-pull".

DRAWSTRING* (CLASS 024)
A securing mechanism including both a string (i.e., a thin elongated flaccid member) and guiding means therefor (e.g., eyelet, hollow hem) located on a portion of the structure-to-be-secured* which surrounds an opening; wherein the string (a) encircles the opening, (b) draws the perimeter of the structure-to-be-secured* toward the center of the opening to close or tighten it when a portion of the string is pulled through its guiding means to shorten the effective length of the remaining portion of the string encircling the opening, and (c) secures the perimeter of the structure-to-be-secured* in its new position when the extracted portion of the string which was pulled through the guide means is prevented from moving (e.g., tied).

DREDGE (CLASS 037)
This is a machine for excavating material at the bottom or the banks of a body of water.

DRESSING (CLASS 452)
Includes the preparation of animals (land or marine) for eatable consumption.

DRIFT CURRENT (CLASS 257)
Current produced in a solid-state electronic device by charge carriers (e.g., holes or electrons) drifting in the direction of an applied electric field.

DRILLING FLUID (CLASS 175)
Any fluid, gaseous or liquid, which is introduced into the bore for the purpose of lubricating or cleaning any part of the boring means, or to displace or assist the tool in displacing the formation, or to flush or clean the bore of cuttings.

DRIVE (CLASS 173)
The motion of a tool which performs a function upon work. Impact is included under the definition of this term. Also, any means to cause the drive motion of a tool such as a motor, cooperating gearing or mechanical movement elements, or an impacting device.

DRIVE (CLASS 175)
A part of the boring means which comprises a motion generating, applying, or transmitting means which is specifically adapted to repeatedly or continuously act upon a boring tool to cause the tool to bore by cutting or penetrating into the earth. Drive is divided into the following major categories: (1) Feed. The sustained forced advance of a boring tool by means other than mere gravity, adapted to cause the tool to cut or penetrate either with or without another type of drive means; (2) Impact Drive. The actuation of a boring tool by a means adapted to deliver a series of blows upon a tool or tool shaft, said impact delivering means being adapted to move relative to said tool or tool shaft; (3) Reciprocating Drive. The actuation of a boring tool by means adapted to cause the tool to partake of to and fro axial movement, at least one direction of axial movement being caused by the drive; (4) Rotary Drive. The actuation of a boring tool by means causing the tool to continuously rotate about its own axis, and includes uniform or step by step unidirectional or oscillatory motion.

DRIVE SLIP (CLASS 701)
The slippage of a wheel caused by the driving condition during acceleration of the vehicle.

DRIVE TRAIN (CLASS 475)
Mechanism including a group of interconnected elements which transfers rotational power from a power source* to a load device*.

DRIVE-MEANS* (CLASS 187)
Means for supplying a motive force to an element to be moved which includes both force generating means (e.g., motor) and structural linkage (e.g., gears) needed to transmit the force from the generating means to the element.

DRIVER (CLASS 227)
A tangible instrumentality having a surface portion which is specifically designed and intended, upon actuation of said instrumentality, to act upon a member (or work) with sufficient force, to impart translatory motion there to effect an operation of the class type.

DRIVER-CARRIAGE (CLASS 227)
Structure to support the driver in a device of the class type.

DRIVING-STATION (CLASS 227)
That region of a machine wherein work must be located for an intended driving operation of the class type to be performed thereon.

DROSS (CLASS 164)
The scum that forms on the surface of molten metals.

DRUM (CLASS 425)
A hollow cylinder, substantially circular in cross-section, which has a surface used as a shaping or working surface.

DRY (CLASS 426)
Products which are as a complete product free or relatively free from water and under normal ambient conditions involve such characteristics, but not necessarily each and every one, as free flowing, dry to the touch, nontacky or sticky, nonadhesive, granular, powder, tablet, flake, flour, meal, particulate, pellet, finely divided, etc.

DRY TONER (CLASS 430)
Particulate material which develops an electrostatic, magnetic, or electrical image by attraction of the particulate material to the image.

DSP (CLASS 438)
double stacked capacitor

DTL (CLASS 438)
diode-transistor logic

DUAL GUARD-BAND ISOLATION (CLASS 257)
A type of electrical isolation of functional elements of an integrated circuit comprised of two distinct unused areas of chip surface area adjacent to the elements desired to be electrically isolated.

DUAL GUARD-BAND ISOLATION (CLASS 438)
A type of electrical isolation of functional elements of an integrated circuit comprised of two distinct unused areas of chip surface area adjacent to the elements desired to be electrically isolated.

DUAL-IN-LINE (DIP) (CLASS 257)
See DIP.

DUF (CLASS 438)
diffusion under film

DUT (CLASS 438)
device under test

DUV (CLASS 438)
deep ultraviolet

DYE ADDITIVE (CLASS 008)
A dye additive or assistant is defined to be any material added to a dye to help in dyeing and is not basically a part of the dye itself.

DYEING (CLASS 008)
Is employed in this classification in its understood and accepted meaning in the art, that is to say, it denotes imparting a substantially permanent color to organic fibrous or filamentous material or other porous material by the use of substances, or preparations possessing tincorial properties and which are not dependent for their ability to become fixed to the base solely upon the presence of an adhesive of bindive vehicle or ingredient, as distinguished from the application of an insoluble pigment suspended in a bindive vehicle, e.g., paint or any colored coating composition where the coloring agent does not actually color the base.

DYNAMIC LIBRARY (CLASS 506)
Collection of compounds, in solution, in dynamic equilibrium (i.e., constantly changing). If the composition of the library is altered by the presence of a target which selectively binds certain library members, then shifting of the equilibrium will lead to an increase in the amount of those components which bind to the target with relatively high affinity. A dynamic library contains all the potentially possible combinations of the components undergoing dynamic random connection, whether these combinations are or are not actually present in the conditions used. It is a virtual library. A real entity is generated in the presence of the target.

DYNAMIC RANDOM ACCESS MEMORY (DRAM) (CLASS 257)
solid-state memory in which the information decays over time and needs to be periodically refreshed.

DYNAMIC RANDOM ACCESS MEMORY (DRAM) (CLASS 438)
Solid-state memory in which the information decays over time and needs to be periodically refreshed.

DYNAMIC SUBJECT MATTER (CLASS 249)
Means for preforming a function in which motion of the means or a part thereof is essential to accomplishment of the function.

DYNAMIC SUBJECT MATTER (CLASS 425)
Apparatus in which motion of a part is essential to accomplish a desired function, (e.g., shaping, cutting, etc.).

DYNAMOELECTRIC MACHINE (CLASS 363)
A device for converting electrical energy into mechanical energy or mechanical energy into electrical energy or combinations thereof which involve electromagnetic induction. (Also see particular type).

DYNAMOTOR (CLASS 363)
Also called a rotary converter or synchronous inverter. A rotating device for changing a D.C. voltage to another value. It is a combination electric motor and D.C. generator with two or more armature windings and a common set of field poles. One armature winding receives the direct current and rotates (thus operating as a motor), while the others generate the required voltage (and thus operate as dynamos or generators).

DZ (CLASS 438)
denuded zone -E-

| A | B | C-CL | CM-CZ | D-DIM | DIM-DZ | E | F | G | H | I | J-K | L | M-MET | MET-MZ | N | O | P-PHA | PHE-PON | POR-PZ | Q | R | S-SEPA | SEPO-SMT | SN-STEM | STEP-SZ | T-TOG | TON-TZ | U | V | W | X-Z |

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