(under subclass 430) Alloy, or metallic composition which additionally contains at least one of the elements, carbon, boron, or nitrogen.
SEE OR SEARCH CLASS
75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,
230+, and 244 for particulate metal carbide (236+) boride, or nitrite (244) bonded with a metal (commonly cobalt), e.g., the so called "sintered carbides", etc. See the class definition of this class for the distinction between the alloys and metallic compositions of this class and the consolidated metal powder composition for Class 75.
423, Chemistry of Inorganic Compounds,
409, for a pure, stoichiometric tungsten nitride, subclass 440, for a pure, stoichiometric tungsten carbide, subclass 297, for a pure, stoichiometric tungsten boride.
