(under the class definition) Subject matter in which the composition contains free (elemental) metal or free (elemental) carbon.
(1) Note. See section A, 2 (b) of the class definition.
(2) Note. Patents classified in this class, subclasses 30, 37+ or 87 as originals or cross-references are not cross-referenced here except for claims or disclosure which go beyond subject matter proper for those subclasses.
SEE OR SEARCH CLASS
75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,
252+, for a loose mixture of metal and nonmetal particles.
428, Stock Material or Miscellaneous Articles, 546+, for stock material manufactured from particulate metal or a mixture of metal and nonmetal particles.
