US PATENT SUBCLASS 75 / 236
.~.~.~ Carbide containing

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

300  DF  COMPOSITIONS {5}
228  DF  .~ Consolidated metal powder compositions {4}
230  DF  .~.~ With nonmetal constituent - Silicon(Si) considered a metal (e.g., cermet, etc.) {5}
236.~.~.~ Carbide containing {4}
237  DF  .~.~.~.~> With another nonmetal {1}
239  DF  .~.~.~.~> Carbide only of Vanadium(V), Niobium(Nb) or Columbium(Cb), or Tantalum(Ta)
240  DF  .~.~.~.~> Carbide only of Chromium(Cr), Molybdenum(Mo), or Tungsten(W)
241  DF  .~.~.~.~> Carbon(C) associated with more than one metal {1}

DEFINITION

Classification: 75/236

Carbide containing:

(under subclass 230) Composition in which the nonmetal is carbon in the form of a carbide.

(1) Note. This subclass (236) is the locus for a composition under subclass 230 which has a single metal carbide as its sole nonmetal component, which carbide is of a metal other than Vanadium (V), Niobium (Nb) or Columbium (Cb), Tantalum (Ta), Chromium (Cr), Molybdenum (Mo), or Tungsten (W).

(2) Note. The mere designation of a composition or a component of a composition as a "carburized" metal, alloy, or other metal product, is not sufficient for placement of a patent in this subclass; rather, such patent is placed in a subclass providing for elemental carbon, e.g., subclass 243.

SEE OR SEARCH THIS CLASS, SUBCLASS:

233, for consolidated metal powder compositions containing an oxide as well as a carbide. Where the oxide is a necessary component of the composition, a patent for such composition is not cross-referenced to this subclass or its indented subclasses.

SEE OR SEARCH CLASS

252, Compositions, 62.3, for a barrier layer device composition containing a binary alloy or carbide, and subclass 516 for an electrically conductive or emissive composition containing a carbide.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

603+, for vitrifying or sintering a refractory preform.

501, Compositions: Ceramic,

87+, for ceramic compositions which have a nonmetal matrix and contain a carbide.