US PATENT SUBCLASS 501 / 88
.~.~ Silicon carbide

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
87  DF  .~ Carbide or oxycarbide containing {2}
88.~.~ Silicon carbide {4}
89  DF  .~.~.~> And aluminum compound
90  DF  .~.~.~> And carbonaceous material
91  DF  .~.~.~> And different carbide
92  DF  .~.~.~> And boride, silicide, nitride, or oxynitride

DEFINITION

Classification: 501/88

Silicon carbide:

(under subclass 87) Compositions which contain a silicon carbide, e.g., SiC.