US PATENT SUBCLASS 264 / 646
.~ Utilizing chemically reactive atmosphere other than air, per se, during sintering to convert precursor to ceramic material

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}
646.~ Utilizing chemically reactive atmosphere other than air, per se, during sintering to convert precursor to ceramic material {2}
647  DF  .~.~> Nitrogen
648  DF  .~.~> Using oxygen enriched gas or oxidizing atmosphere (i.e., other than air, per se)

DEFINITION

Classification: 264/646

Utilizing chemically reactive atmosphere other than air, per se, during sintering to convert precursor to ceramic material:

(under subclass 603) Process wherein a solid precursor material chemically reacts with a gaseous agent, other than air, surrounding the precursor to form a new ceramic composition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81, for reactive gas or vapor treatment of work.

85, for utilizing special inert gaseous atmosphere.

664, for specifying nonreactive heating atmosphere.

674, for utilizing specified composition of heating nonreactive atmosphere other than air.