US PATENT SUBCLASS 34 / 499
.~.~.~ Rotating drum

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}
498  DF  .~.~ With treated material motion {5}
499.~.~.~ Rotating drum

DEFINITION

Classification: 34/499

Rotating drum:

(under subclass 498) Process wherein the material motion is produced by a revolving cylinder.