US PATENT SUBCLASS 264 / 648
.~.~ Using oxygen enriched gas or oxidizing atmosphere (i.e., other than air, per se)

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

DEFINITION

Classification: 264/648

Using oxygen enriched gas or oxidizing atmosphere (i.e., other than air, per se):

(under subclass 646) Process wherein the reactive agent is identified as an oxygen enriched gas or an oxidizing gas (i.e., other than air, per se.).