US PATENT SUBCLASS 34 / 122
.~.~.~ Gas or vapor circulation for contact with treated material

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

523  DF  APPARATUS {40}
108  DF  .~ Rotary drums or receptacles {7}
110  DF  .~.~ External {6}
122.~.~.~ Gas or vapor circulation for contact with treated material

DEFINITION

Classification: 34/122

(under subclass 110) Apparatus including means to contact the solids with a gas or vapor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114, and 115.