US PATENT SUBCLASS 34 / 480
.~.~.~ Filtering 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}
480.~.~.~ Filtering of gas or vapor

DEFINITION

Classification: 34/480

Filtering of gas or vapor:

(under subclass 467) Process wherein the treating gas or vapor is directed through a purifying medium to remove or separate particulate matter from the treating gas or vapor.