US PATENT SUBCLASS 423 / 447.7
.~.~.~ In specific atmosphere (other than vacuum or air)

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

414  DF  CARBON OR COMPOUND THEREOF {3}
445 R  DF  .~ Elemental carbon {7}
447.1  DF  .~.~ Fiber, fabric, or textile {7}
447.7.~.~.~ In specific atmosphere (other than vacuum or air)

DEFINITION

Classification: 423/447.7

(under subclass 447.1) Processes including a step of reaction in a specifically recited atmosphere other than vacuum or air.