US PATENT SUBCLASS 34 / 504
.~.~.~ Countercurrent gas or vapor flow

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}
504.~.~.~ Countercurrent gas or vapor flow {1}
505  DF  .~.~.~.~> Gravity flow of material

DEFINITION

Classification: 34/504

Countercurrent gas or vapor flow:

(under subclass 498) Process wherein the direction of flow of the treating gas or vapor and the direction of movement of the treated material are opposite to each other.