US PATENT SUBCLASS 252 / 503
.~.~ With free metal

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

500  DF  ELECTRICALLY CONDUCTIVE OR EMISSIVE COMPOSITIONS {6}
502  DF  .~ Elemental carbon containing {5}
503.~.~ With free metal

DEFINITION

Classification: 252/503

(under subclass 502) Compositions which contain free metal in addition to the elemental carbon.