US PATENT SUBCLASS 34 / 477
.~.~.~.~ With recirculation of gas or vapor

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

282  DF  PROCESS {24}
443  DF  .~ Gas or vapor contact with treated material {17}
467  DF  .~.~ Treatment of gas or vapor {6}
476  DF  .~.~.~ Gas or vapor temperature regulation {1}
477.~.~.~.~ With recirculation of gas or vapor

DEFINITION

Classification: 34/477

With recirculation of gas or vapor:

(under subclass 476) Process wherein the treating gas or vapor after contacting the treated material is brought back into contact with the material to treat the material at least one more time.