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USPTO Terms of Art — X to Z

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 |

X-RAY (CLASS 378)
Electromagnetic radiation lying in a range between "cosmic rays" and "ultraviolet rays". This range is defined as lying between 0.001 and 100 angstrom units or 10-11 and 10-6 centimeters in wavelength.

X-RAY TUBE (CLASS 313)
A discharge device designed to generate X-rays.

XRD (CLASS 438)
x-ray diffraction

YAG (CLASS 117)
Yttrium Aluminum Garnet.

YBCO (CLASS 438)
yttria barium copper oxide (a HTSC)

YSZ (CLASS 438)
yttria stabilized zirconia

ZDO (CLASS 438)
zero drain overlap

ZENER CURRENT (CLASS 257)
The current generated by a Zener diode when its reverse voltage is increased above the Zener breakdown value.

ZENER DIODE (CLASS 257)
A single pn junction, two terminal semiconductor diode reversed biased into breakdown caused by the Zener effect, i.e., by field emission of charge carriers in the device'S depletion layer. NOTE: True Zener breakdown occurs in silicon at values below 6 volts. It is to be distinguished from the avalanche breakdown mechanism that occurs in reverse biased diodes at higher (about 6 volts) voltages.

ZENER DIODE (CLASS 438)
A single pn junction, two terminal semiconductor diode reversed biased into breakdown caused by the Zener effect (i.e., by field emission of charge carriers in the device'S depletion layer). NOTE: True Zener breakdown occurs in silicon at values below 6 volts. It is to be distinguished from the avalanche breakdown mechanism that occurs in reverse biased diodes at higher (about 6 volts) voltages.

ZEOLITE (CLASS 502)
A hydrous alumino silicate characterized by a three dimensional framework of Si04 and Al04 tetrahedra, cross-linked by the sharing of oxygen atoms being chemically balanced by a cation, usually sodium or calcium and of crystalline structure such that openings or pores allow access to a relatively large absorption area inside the crystal. The cation may be ion exchanged for other metal ions, ammonia, an amine or hydrogen. Zeolites may be activated for sorption by driving off the water of hydration.
(1) Note. Terms Recognized as being Zeolite include Analcite, Cancrinite, Chabazite, Clinotilolite, Cordierite, Edingtonite, Erionite, Faujasite, Ferrierite, Gmelinite, Heulandite, Laumontite, Levynite, Mesolite, Mordenite, Natrolite, Offretite, Paulingite, Phillipsite, Ptilolite, Scolecite, Thomsonite, ZSM, and ZK.
(2) Note. See the list in (3) Note of the definition of Clay, supra, for some silicon compounds not treated as clays or zeolites in this class (502).
ZIP (CLASS 438)
zigzag-in-line package

ZIPPER(*) (CLASS 024)
A mechanism for either closing an opening in structure-to-be-secured*, or connecting together separate members of structure to be secured* including (a) two, opposed, elongated, cooperating, configured surfaces which are attached to the structure-to-be-secured* by mounting means and intended to directly contact and interlock with each other (i.e., the movement between the configured surfaces is restricted in the direction force is transmitted thereto by the structure-to-be-secured*) when closing or connecting, and (b) a sliding device which is much shorter in length than the surfaces and which travels along the length of the surfaces sequentially contacting and simultaneously camming against each segments of both surfaces to forcibly shift them into or out of interlocking engagement, the direction of travel of the device generally being perpendicular to the shifting motion of the interlocking configured surfaces.

ZMR (CLASS 117)
Zone Melt Recrystallization.

ZMR (CLASS 438)
zone melt recrystallization

ZONE MELTING (CLASS 373)
A process where a selected area of a charge is heated in liquification.

| 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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