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USPTO Terms of Art — E

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 |

E-MOSFET (CLASS 257)
Enhancement mode metal oxide semiconductor device. See ENHANCEMENT MODE and MOSFET.

EAR (CLASS 460)
The article usually consists of grain bearing spike of a cereal plant such as an ear of corn.

EAROM (CLASS 438)
electrically alterable read-only memory

EARTH (CLASS 037)
This term is applied to the fragmental material composing part of the surface of the globe.

EARTH WORKING ELEMENT (CLASS 172)
Synonymous with "tool".

EARTHENWARE (CLASS 425)
A product made of (1) slightly porous opaque clay fired at low heat; (2) inorganic settable ingredient containing, (e.g., Portland cement type, etc.), (3) powdered metal (4) ceramics other than glass or slag; (5) alkali metal silicate containing.

EARTHENWARE, PORCELAIN (CLASS 501)
These terms designate fine grained or fully vitreous, high fired white or translucent ceramic materials, frequently, but not always containing clay or similar plastic components. Among many terms used to designate somewhat similar materials are stoneware, earthenware, porcelain, pottery, china, whiteware, tile, crockery, sanitaryware, terra cotta, bisque, rakuware, and slip cast ware. They are not intended for use in the high temperature or corrosive environments where materials referred to as refractories are typically employed.

EB (CLASS 438)
(a) extrinsic base or (b) electron beam

EB JUNCTION (CLASS 257)
Emitter base junction in a bipolar transistor.

EBES (CLASS 438)
electron beam exposure system

EBIC (CLASS 438)
electron beam induced current

EBL (CLASS 438)
electron beam lithography

ECL (CLASS 438)
emitter coupled logic

ECR (CLASS 438)
electron cyclotron resonance

EDFFG (CLASS 117)
Edge-Defined Film-Fed Growth. Also abbreviated as EDFG and EFG.

EDIBLE (CLASS 099)
An object that is subject to consumption by an human or animal by chewing or masticating prior to swallowing.

EDP (CLASS 438)
ethylene-diamine-pyrocatechol etchant

EDTA (CLASS 438)
ethylenediaminotetraacetic acid

EELS (CLASS 438)
electron energy loss spectroscopy

EEPROM (CLASS 438)
electrically erasable programmable read-only memory

EFFLUENT (CLASS 210)
The liquids flowing out of a process, normally the mainstream, can be either a desired product or discard.

EFG (CLASS 438)
edge-defined film-fed growth (also EDFFG or EDFG)

EG (CLASS 438)
extrinsic gettering

EGSi (CLASS 438)
electronic-grade silicon

EJECTOR (CLASS 221)
Any discharge assistant which acts directly upon an article or articles to be dispensed at any one operation to segregate or separate the same from the remainder of the supply. Followers are discharge assistants which are not included in this term since they exert force through the entire supply rather than directly on the articles to be dispensed.

EJECTOR (CLASS 347)
The mechanism which projects the fluid* onto the medium*.

EJECTOR (CLASS 425)
Means to release or remove a product from a shaping surface.

EL (CLASS 438)
electroluminescent

ELECTRIC CARRIERS OF A TRANSISTOR (CLASS 330)
Current flow in a transistor may be by negative carriers (electrons) or positive carriers (holes).

ELECTRIC DISCHARGE (CLASS 330)
The flow of current between two spaced electrodes at different potentials or the charge carrier particles conveying the current from one spaced electrode to the other.

ELECTRIC ENERGY GENERATORS (CLASS 322)
As used herein are devices and apparatus for converting any character of nonelectric energy to electric energy.

ELECTRIC GENERATING (CLASS 322)
As used herein involves the conversion of any character of nonelectric energy to electric energy.

ELECTRIC LAMP (CLASS 313)
A device for converting electrical energy into visible light or ultraviolet light. Most lamps also generate infrared rays, but infrared ray generators are included only when they have structure analogous to electric lamps or electric space discharge devices. See the notes below. Electric lamps may be in the form of electric space discharge devices, for which see the next paragraph.

ELECTRIC MOTOR (CLASS 388)
A machine which transforms electrical energy into mechanical work. Note: For a description of each of the several types of electric motor, see section IA above.

ELECTRIC MOTOR: (CLASS 318)
A machine which transforms electric energy into mechanical energy.

ELECTRIC SIGNAL SOURCE OR SIGNAL SOURCE (CLASS 330)
The source of electrical signal energy to be amplified or the source of electrical signal energy which controls the electric power supply applied to the amplifying device.

ELECTRIC SOURCE CIRCUIT (CLASS 363)
The circuit designed to be connected to a source of electric energy.

ELECTRIC SPACE DISCHARGE DEVICES (CLASS 313)
(the shorter expression "DISCHARGE DEVICES" is used in these definitions) Any device which is intended to have an electrical current flow between two spaced electrodes, at least part of the path followed by the discharge being constituted by a gas, vapor, or vacuum.

ELECTRIC SPACE DISCHARGE DEVICES (CLASS 315)
The shorter expression "DISCHARGE DEVICES" is used in these definitions, are defined for the purpose of classification in this class as including any device which is intended to have an electrical current flow between two spaced electrodes, at least part of the path followed by the discharge being constituted by a gas, vapor, or vacuum.

ELECTRICAL CIRCUIT (CLASS 330)
An electrical network providing one or more closed paths.

ELECTRICAL NETWORK OR NETWORK (CLASS 330)
An arrangement of electrically connected electrical elements and/or devices which are capable of carrying electric A.C. or D.C. current. Note. A network does not define the structure in space of the network elements or their arrangement in space relative to each other; it merely defines the elements or devices broadly by type as to the electrical function they perform and the electrical connections which will carry current between such elements and/or devices.

ELECTRICAL NOISE OR RANDOM WAVE GENERATOR (CLASS 331)
A wave generator system wherein the frequency determining element consists of a material medium including electrically charged, chargeable or ionizable particles, the application of electrical energy to the medium by the driving means causing random translatory motion of the charged or ionizable particles resulting in the generation of an infinite number of waves of different frequencies which are fortuitously related, having no definite phase relationship, period, amplitude or shape.

ELECTRICAL SOURCE CIRCUIT (CLASS 323)
The input terminals which are to be connected to a source of electrical energy.

ELECTRICAL SPACE DISCHARGE DEVICE (CLASS 363)
An apparatus which is intended to have an electrical current flow between two spaced electrodes, at least part of the current path being constituted by a gas vapor or vacuum. "Electronic tube" is used as the name for an electric space discharge device in this class. Included are discharge devices which operate in the open, i.e., not in an enclosed envelope.

ELECTRO-OPTIC (CLASS 372)
The effect, on the properties of a beam of light, by an electrical field, interacting with the light within a volume of matter.

ELECTRODE (CLASS 313)
A filament or glower of an electric lamp or a member arranged to emit, and/or collect, and/or control the movement of electrons or ions in a discharge device.

ELECTRODE (CLASS 330)
(1) In a vacuum tube, electronic tube or in any discharge device, the conductive elements between which the electric discharge takes place, and to which the power supply is applied; any additional conductive means placed in proximity to the electric discharge and/or other electrodes to affect electrostatically the discharge or the potentials of the electrodes with which they are in proximity. (2) In a magnetic amplifying device or in a resistive amplifying device, (including semiconductive devices) the terminals of windings which influence the operation of the magnetic device or the resistor or semiconductor terminals by means of which electric current may flow in or out of the resistor or semiconductor or by means of which a potential may be applied to the resistor or semiconductor.

ELECTRODE (CLASS 373)
An electrical conducting element that emits, or collects electrons, or ions, or controls their movement by means of an electric field on it.

ELECTRODE (CLASS 429)
The electron current carrying material or structure at which the current producing chemical reaction takes place

ELECTROLYSIS (CLASS 204)
A process which is characterized by conduction of an electric current between two or more electrodes through an electrolyte and resulting in a chemical change (e.g., oxidation, reduction, etc.) (other than that brought about by the mere heating effect of the electric current) at one or more of the electrodes (e.g., electrolytic coating or etching, etc.) or at another location in contact with the electrolyte as a direct result of the electric current passing therethrough (e.g., electrolytic material treatment, etc.), such chemical change being the process objective and not merely as a means of conducting an electric current through the electrolyte (as is the case in "electrophoresis" as defined in subclass 450 of this class).

ELECTROLYTE (CLASS 204)
A substance which is or forms a liquid, solid, or gel containing dissociated ions to conduct an electrolytic current (usually an ionic compound is dissolved in solution or melted into a fused state to provide an electrically conductive medium).

ELECTROLYTE (CLASS 429)
A material capable of passing an ionic current.

ELECTROMAGNETIC OPERATOR (CLASS 334)
A machine or device which is capable of exerting a force upon the control or actuator of an element or circuit to thus move or control the element or circuit, the machine or device being operated by the interaction of the magnetic effect of an electrical current and/or magnetic field. An example, of this type of machine or device is a relay, solenoid or electric motor connected to the shaft of a variable capacitor, the machines or devices responding to a flow of current and/or voltage through them to thus drive or move the shaft of the variable capacitor.

ELECTROMAGNETIC WAVE POLARIZATION CONVERTER (CLASS 342)
Structure which acts directly on the electromagnetic wave energy to modify the polarization pattern of the wave, for example, to change a plane polarized wave into a circularly polarized wave.

ELECTROMAGNETIC WAVE POLARIZATION FILTER (CLASS 343)
Structure which acts directly on the electromagnetic wave to filter out wave energy of an undesired polarization and to pass wave energy of a desired polarization.

ELECTROMAGNETIC WAVE REFRACTOR (CLASS 343)
Structure which is shaped or positioned to delay or accelerate transmitted electromagnetic waves, passing through such structure, an amount which varies over the wave front, to alter the direction of propagation of the waves emitted from the structure with respect to the waves impinging on the structure, or to bring the wave to a focus, or to alter the wave front (such as to convert a spherical wave front to a planar wave front or vice versa).

ELECTROMAGNETIC WAVES (CLASS 522)
The term "electromagnetic waves" as employed herein includes, for example, X-rays and gamma rays; ultraviolet, infrared, and visible light rays, and short electric and radio waves. Energy which produces merely a thermal effect or heat waves, per se, is excluded. Microwave energy is considered to produce a thermal effect unless there is a direct statement to the contrary, and is not proper for this class.

ELECTROMECHANICAL RESONATOR (CLASS 331)
A resonator comprising an electrically driven material body wherein the mass and compliance parameters of the body determine the mechanical period of vibration of the body and wherein the driving electrical circuit for the body exhibits electrical resonance characteristics which are determined by the mechanical period of vibration of the body.

ELECTROMECHANICAL TRANSDUCER (CLASS 330)
Means to convert the electric signal to mechanical vibrations and means further to convert the mechanical vibrations back to electric signals, such means generally serving as either time or phase delay means or means to determine the transmission frequency of the coupling network.

ELECTROMIGRATION (CLASS 438)
Mass transport of ions (i.e., usually metal) in a material as a response to the passage of current through the material by momentum exchange between thermally activated ions and conduction electrons.

ELECTRON (CLASS 257)
The negatively charged particle in an atom that orbits the nucleus in specific energy levels.

ELECTRON BEAM (CLASS 373)
A narrow stream of electrons moving in the same direction under the influence of an electric, or magnetic field.

ELECTRON FLOW (CLASS 257)
Movement of electrons from a source of negative potential to a positive potential.

ELECTRON-HOLE PAIR (CLASS 257)
A positive charge carrier (i.e., hole) and a negative charge carrier (i.e., electron) considered together as being created or destroyed as part of one and the same event.

ELECTRON-HOLE PAIR (CLASS 438)
A positive charge carrier (i.e., hole) and a negative charge carrier (i.e., electron) considered together as being created or destroyed as part of one and the same event.

ELECTRONIC (CLASS 326)
Pertaining to that branch of science which deals with the motion, emission, and behavior of currents of free electrons, especially in vacuum, gas, or phototubes and special conductors or semiconductors. The term electronic is contrasted with electric, which pertains to the flow of large currents in metal conductors.

ELECTRONIC DEVICE (CLASS 326)
A device in which conduction is principally by the movement of electrons through a vacuum, gas, or semiconductor. This definition excludes inductors, capacitors, resistors, and similar components.

ELECTRONIC PROGRAM GUIDE (EPG) (CLASS 725)
A display interface which allows user s interaction with a program grid having intersecting row(s) and column(s) of video program information.

ELECTRONIC TUBE (CLASS 323)
An apparatus which is intended to have an electric current flow between two spaced electrodes, at least part of the current path being constituted by a gas, vapor, or vacuum, "Electronic Tube" is used as the name for an electric space discharge device in this class. Included are discharge devices which operate in the open, i.e., not in an enclosed envelope.

ELECTRONIC TUBE (CLASS 330)
An electric space discharge device, that is, a device in which electricity flows from one electrode to another by means of free electrical charge carrier particles traveling in a vacuum, gas or vapor; included are electric space discharge devices (also called electronic tubes) which operate in the open, i.e., not in an enclosed envelope. The electrical charge carrier particles may be of any type, usually electrons for vacuum tubes or charged ions for gas or vapor tubes.

ELECTRONIC TUBE (CLASS 363)
An electrical space discharge device.

ELECTROPHORESIS (CLASS 356)
The effect in which charged particles suspended in a liquid are moved under the influence of an electrostatic field.

ELECTROSLAG DEVICE (CLASS 373)
Apparatus enabling one, or more electrodes to be immersed in a slag layer which floats on top of the melt.

ELECTROSTATOGRAPHY (CLASS 399)
The formation and utilization of latent electrostatic charge patterns for recording or reproducing patterns in viewable form, for example: reproducing information from an original or carrier by selectively exposing a photoconductive member to an electrical or magnetic condition that produces a latent image whereby the image is developed to a visible image, then transferred and fixed from the photoconductive member to a medium.

ELEMENT (CLASS 338)
Resistance element unless otherwise indicated.

ELEMENT (CLASS 351)
Component part of an optical instrument unless otherwise indicated.

ELEMENT (CLASS 428)
See definition of constituent*. (Structural)

ELO (CLASS 438)
epitaxial lateral overgrowth

EMBOSSING (CLASS 065)
Altering a surface configuration only of glass by raising a boss or protuberance thereon or causing surface portions to be depressed below the plane of the glass surface.

EMBOSSING (CLASS 425)
Altering a surface configuration only.

EMD (CLASS 438)
enhancement mode device (also E-mode or E-type)

EMI (CLASS 438)
electromagnetic interference

EMISSIVE CATHODE (CLASS 313)
A low work function electrode.

EMITTER (CLASS 257)
The region of a bipolar junction transistor from which charge carriers flow through the emitter-base junction into the base region of the device.

EMITTER CURRENT (CLASS 257)
The amount of current flowing from the emitter across the emitter-base junction into the base region of the device.

EMITTER ELECTRODE (CLASS 330)
See the definition of point contact or junction type transistor in this Glossary.

EMP (CLASS 438)
electron microprobe

ENCAPSULATING (CLASS 588)
To immobilize hazardous or toxic waste materials by any means to include vitrification, combining with organoclay and mixing, adding a cement material, or enclosing in a container the hazardous or toxic waste material. The hazardous or toxic waste material is held in place and is not permitted to be leached or leaked out into the environment.

ENCLOSURE (CLASS 052)
Means surrounding an area or volume to be occupied by persons, animals or goods.

ENCRYPTING OR ENCIPHERING (CLASS 380)
A process of obscuring information by intentionally changing it to a form unintelligible to a casual or unauthorized observer.

ENCRYPTION (CLASS 725)
The process of encoding data to prevent unauthorized access, especially during transmission. Encryption is usually based on a key that is essential for decoding.

END EFFECTOR (CLASS 901)
A device connected to the distal end of the robots arm* which carries out the robots intended function.

END EFFECTOR: (CLASS 700)
A terminal on a robot arm that carries a hand, welding gun, painting nozzle, or other tool.

END FACE (CLASS 092)
The end face of the piston consists of the portion thereof which is opposite the abutment of reaction surface of the cylinder and which is adapted to contact the working fluid.

END SHEETS(*) (CLASS 412)
The sheet(*) of paper at the front(*) and end of a book(*) overlaying the inner sides of the boards of the covering member serving with the linings(*) to secure the book(*) to its associated covering member.

ENDLESS (CLASS 425)
A closed loop, such as the peripheral surface of a roll, a cylinder or a drum.

ENERGY LEVELS (CLASS 257)
The possible energy values that an atom or molecule or subatomic particle (e.g., an electron) can have.

ENGINE (CLASS 440)
A device which converts thermal energy into mechanical energy or power to produce force or motion.

ENGINE: (CLASS 477)
A primary source of rotational energy.

ENHANCEMENT MODE (CLASS 257)
The operation of a field effect transistor which has a channel formed therein between its source and drain regions and which normally does not conduct current through its channel with zero voltage applied to its gate electrode. Voltage of the correct polarity will accumulate minority carriers in the channel to permit conduction of current in the channel, thus turning on the transistor.

ENHANCEMENT MODE (CLASS 438)
The operation of a field effect transistor which has a channel formed therein between its source and drain regions and which normally does not conduct current through its channel with zero voltage applied to its gate electrode. Voltage of the correct polarity will accumulate minority carriers in the channel to permit conduction of current in the channel, thus turning on the transistor.

ENTERPRISE (CLASS 705)
A conventional business organization, a governmental organization or a nonprofit organization.

ENTITY (CLASS 709)
A computer or process that can be treated as a unit and, often, as a member of a particular category or type.

ENTITY (CLASS 718)
A computer or process that can be treated as a unit and, often, as a member of a particular category or type.

eNTITY (CLASS 719)
A computer or process that can be treated as a unit and, often, as a member of a particular category or type.

ENTRANCE (CLASS 052)
An opening for persons or things, but not for a fluid or a mass of particles having a fluid like characteristic.

ENVELOPE (CLASS 313)
A gas tight enclosure for an electric lamp or discharge device. It may be evacuated or filled with a gas or vapor. In general the distinction between an envelope and a mere jacket, casing or housing is that the envelope is sealed, so as to be gas tight.

ENVIRONMENT (CLASS 709)
A set of resources made available to the user of a system which defines specifications such as the command path (where to look for files), the system prompt and, sometimes, the location of resources or working files.

ENVIRONMENT (CLASS 718)
A set of resources made available to the user of a system which defines specifications such as the command path (where to look for files), the system prompt and, sometimes, the location of resources or working files.

ENVIRONMENT (CLASS 719)
A set of resources made available to the user of a system which defines specifications such as the command path (where to look for files), the system prompt and, sometimes, the location of resources or working files.

ENVIRONMENTALLY SAFE SUBSTANCE (CLASS 588)
Is any material that in any of its chemical or physical interactions with the environment results in no measurable adverse effects or degradations on the environment.

ENZYME (CLASS 977)
Protein that functions as a biochemical catalyst for a biochemical reaction.

EPB (CLASS 438)
epoxidated polybutadiene (an EB resist)

EPD (CLASS 438)
etch pit density

EPI (CLASS 438)
epitaxial (single crystalline) layer

EPITAXIAL LATERAL OVERGROWTH (CLASS 438)
Process of epitaxial deposition through an exposed opening in an insulating layer with deposition continuing epitaxially over the insulating layer laterally from the opening.

EPITAXIAL LAYER (CLASS 257)
An added layer of crystal that takes on the same crystalline orientation as the substrate crystal.

EPITAXY (CLASS 117)
Formation of a single-crystal* on a substrate* (which acts as a seed*) or the product of such a process. Usually, the formed crystal bears a definite crystallos:graphic relationship to the substrate*. Typically, the term applies to coating or layer formation when the width and length are substantially larger than the height and when the substrate* remains as a significant or integral part of the product in use.

EPITAXY (CLASS 257)
The growth of a crystal of one substance on the surface of a crystal of the same or another substance so that the crystal lattice of the base substance controls the orientation of the atoms in the grown crystal.

EPITAXY (CLASS 438)
The controlled growth of a single crystal of one material on the surface of a crystal of the material (i.e., homo) or onto another substance (i.e., hetero) so that the crystal lattice of the base material controls the orientation of the atoms in the grown single crystal layer.

EPP (CLASS 438)
ethylene-piperidine-pyrocatechol etchant

EPR (CLASS 438)
electron paramagnetic resonance

EPROM (CLASS 438)
erasable programmable read-only memory

EPS (CLASS 438)
effective punchthrough stopper

EPW (CLASS 438)
etchant mix of ethylenediamine, pyrocatechol, and water

EQUALIZER (CLASS 330)
Networks with attenuation or attenuation and phase distortion characteristics which vary over a frequency range for use in a wave transmission system for modifying the attenuation or attenuation and phase characteristics of the wave energy as a function of frequency.

EQUALIZER (CLASS 333)
Networks with attenuation or attenuation and phase distortion characteristics which vary over a frequency range for use in a wave transmission system for modifying the attenuation or attenuation and phase characteristics of the wave energy as a function of frequency.

ERROR (CLASS 712)
Manifestation of a fault as an undesired event that occurs when actual behavior deviates from the behavior that is required by initial specifications.

ERROR (CLASS 713)
Manifestation of a fault as an undesired event that occurs when actual behavior deviates from the behavior that is required by initial specifications.

ERROR (CLASS 714)
Manifestation of a fault as an undesired event that occurs when actual behavior deviates from the behavior that is required by initial specification. This includes a change in information content of pulse or pulse coded data to a state or value other than the normal state or value of a properly operating device or system.

ESAKI DIODE (CLASS 257)
A heavily doped pn junction diode where conduction occurs through the junction potential barrier due to a quantum mechanical effect even though the carriers which tunnel through the potential barrier do not have enough energy to overcome the potential barrier. Esaki tunneling involves a tunneling barrier formed by a macroscopic depletion layer between n-type and p-type regions. It does not involve a resonant tunneling barrier using controlled quantum confinement, a layer located between junctions, nor a thin superlattice layer.

ESAKI DIODE (CLASS 438)
A heavily doped pn-junction diode where conduction occurs through the junction potential barrier due to a quantum mechanical effect even though the carriers which tunnel through the potential barrier do not have enough energy to overcome the potential barrier. Esaki tunneling involves a tunneling barrier formed by a macroscopic depletion layer between n-type and p-type regions. It does not involve a resonant tunneling barrier using controlled quantum confinement, a layer located between junctions, nor a thin superlattice layer.

ESCA (CLASS 438)
electron spectroscopy for chemical analysis

ESD (CLASS 438)
electrostatic discharge

ESR (CLASS 438)
(a) equivalent series resistance or (b) electron spin resonance

ESTER (CLASS 428)
A compound which is identical to that obtained by the replacing of a hydroxy hydrogen of an alcohol or a phenol with an acid radical. (Nonstructural or Composition)

ESTER LINKAGE (CLASS 428)
The chemical grouping obtained by replacing the hydroxy hydrogen of an alcohol or a phenol with an acid radical. (Nonstructural or Composition)

ESTER-TYPE WAX (CLASS 204)
A "wax" which is essentially an ester in chemical structure, (e.g., montan wax, carnauba wax, etc.).

ETHER (CLASS 514)
Denotes an organic compound having oxygen bonded directly to two carbon atoms, which carbons cannot be double bonded to oxygen, sulfur, selenium, or tellurium, or triple bonded to nitrogen.

ETHER (CLASS 520)
Denotes an organic compound characterized by the presence of an oxygen atom bonded directly to two carbon atoms, where the carbon atoms may not be double bonded to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), or triple bonded to nitrogen. An example is dimethyl ether, CH3-O-CH3.

ETHYLENIC (CLASS 987)
Denotes a double bond or triple between adjacent acyclic carbon atoms.

ETHYLENICALLY UNSATURATED (CLASS 520)
Requires the presence of two carbon atoms bonded to each other by a double or triple bond, provided that the double bond is not part of a benzene ring. Indane (Fig. 1) is not within the scope of olefinically unsaturated; coumarone (Fig. 2) and indene (Fig. 3) are within said scope. > FIGURE 2. Coumarone> FIGURE 3. Indene>

EVAPORATION (CLASS 201)
The process of changing a solid or liquid into a vapor. This is the generic term for both sublimation and vaporization. It differs from "distillation" in that distillation includes the additional step of condensing vapor produced to a liquid.

EVAPORATION (CLASS 202)
The process of changing a solid or liquid into a vapor. This is the generic term for both sublimation and vaporization. It differs from "distillation" in that distillation includes the additional step of condensing vapor produced to a liquid.

EVAPORATION (CLASS 203)
The process of changing a solid or liquid into a vapor. This is the generic term for both sublumination and vaporization. It differs from "distillation" in that distillation includes the additional step of condensing vapor produced to a liquid.

EXCESS CARRIERS (CLASS 257)
Charge carriers present in a semiconductor in excess of those present in thermal equilibrium.

EXCITATION (CLASS 704)
Stimulation of the vocal tract by vibratory action of the vocal cords or by a turbulent air flow. In a digital system, the vocal tract is typically modelled with a filter and excitation of the filter is performed using time representations of pitch (voiced excitation) and noise (unvoiced excitation).

EXCITATION* (CLASS 349)
For the purpose of this class, excitation is a force or energy which selects the state of the liquid crystal material.

EXPANDER OR VOLUME EXPANDER (CLASS 330)
A device that expands the volume range, as in recording sound, radio-telephone transmission, etc. In expanding the signal volume range, the amplification of large signals is increased, and the amplification of small signals is reduced. Expanders are used generally to restore a signal after compression.

EXPLOSIVE (CLASS 102)
The term is used to include a detonating, deflagrating, or thermic composition of the type defined in the class definition of Class 149, Explosive and Thermic Compositions or Charges.

EXPLOSIVE COMPOSITIONS (CLASS 149)
Are classified (a) as HIGH EXPLOSIVE, which, for the purpose of this class, is one whose rate of reaction is substantially instantaneous or detonating in character, and is either (1) an extremely sensitive or highly reactive or detonating chemical compound which is known as a PRIMARY EXPLOSIVE and is used to initiate the secondary or other explosive component of the charge; or (2) is a composition of a combination of two or more primary explosives and as such is known as a SECONDARY or other DERIVED EXPLOSIVE. Such an explosive reacts with detonating force or brisance which is sufficient to shatter the surrounding medium; (b) as LOW EXPLOSIVE, which for the purpose of this class, is controlled to some time interval, less than instantaneous, and as compared to that of high explosive, is slow or deflagrating (burning) in character. It has the property or power to displace the surrounding medium. Although it may be used for certain blasting purposes it is used principally as PROPELLANT to set in motion bullets, missiles or similar devices regardless of size.

EXPLOSIVE OR THERMIC COMPONENT (CLASS 149)
As used in this class covers (1) explosive or thermic compositions, per se, (2) the oxidant portion, (3) the fuel portion of such compositions. See also (4) Note class definition.

EXPOSURE (CLASS 396)
Exposure is the act of allowing light to reach the photographic medium.

EXPOSURE (CLASS 430)
Application of radiation to form or perfect an image.

EXPOSURE CONTROL CIRCUIT (CLASS 396)
An exposure control circuit is an electronic circuit to control the exposure.

EXPOSURE OBJECTIVE (CLASS 396)
An exposure objective is an objective that focuses light from the object onto a photographic medium.

EXPOSURE SYSTEM (CLASS 396)
An exposure system is one that has means to regulate or adjust an amount of light reaching the photographic medium.

EXPOSURE TIME (CLASS 396)
Exposure time is the length of time an exposure occurs.

EXPOSURE TIME VALUE (Tv) (CLASS 396)
Exposure time value is a logarithmic number indicative of exposure time.

EXPOSURE VALUE (Ev) (CLASS 396)
Exposure value is the sum of the aperture value and exposure time value.

EXTENSIBLE MARKUP LANGUAGE (XML) (CLASS 707)
A markup language that allows a user to create custom annotations (tags) and to define those custom annotations for use in indicating the structure, formatting, or display instructions for a given section of text or data. It is commonly used as an intermediate format for transferring data between applications.

EXTRACTIVE DISTILLATION (CLASS 202)
A separatory distillation in which a generally less volatile substance, often referred to as a solvent, is added to the distillation column to preferentially remove some components of the vapor by dissolving it. The added substance and the dissolved component are removed below the point at which the less volatile substance is added to the distillation column.

EXTRACTIVE DISTILLATION (CLASS 203)
A separatory distillation in which a generally less volatile substance, often referred to as a solvent, is added to the distillation column to preferentially remove some component of the vapor by dissolving it. The added substance and the dissolved component are removed below the point at which the less volatile substance is added to the distillation column.

EXTRACTORS (CLASS 171)
Devices which comprise means to engage a portion of a buried or partially buried object and to temporarily fasten itself to said object in order to hold onto the object while it is lifted out of the ground.

EXTRINSIC SEMICONDUCTOR (CLASS 257)
A semiconductor whose charge carrier concentration and, therefore, electrical properties depend on impurity, atoms introduced therein.

EXTRINSIC SEMICONDUCTOR (CLASS 438)
A semiconductor whose charge carrier concentration and, therefore, electrical properties depend on impurity atoms introduced therein.

EXTRUDANT (CLASS 264)
A shaped body of material formed by forcing a supply of said material through a confining orifice whereby the cross-sectional area of the extruded portion corresponds to the dimensions of the orifice.

EXTRUDANT (CLASS 425)
A shaped body of material formed by forcing the material through a confining, shaping orifice.

EYE CONTACT LENSES (CLASS 351)
Opthalmic lenses that fit over the cornea of the eye and which float on the tear of the eye or are held in place by the eyelids.

EYEGLASSES (CLASS 351)
Spectacles, pince-nez or other mountings with lenses to correct defects of vision of the human eye.

| 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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