US PATENT SUBCLASS 264 / 665
.~.~.~ Silicon nitride containing product

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

603  DF  OUTSIDE OF MOLD SINTERING OR VITRIFYING OF SHAPED INORGANIC ARTICLE OR PREFORM {30}
653  DF  .~ Including plural heating steps {3}
662  DF  .~.~ Including diverse heating of article subsequent to sintering {2}
665.~.~.~ Silicon nitride containing product

DEFINITION

Classification: 264/665

Silicon nitride containing product:

(under subclass 662) Process wherein a silicon nitride compound containing material is produced or treated.