US PATENT SUBCLASS 202 / 200
.~.~.~.~.~ Filter

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
152  DF  .~.~ Separatory {3}
163  DF  .~.~.~ Still {13}
182  DF  .~.~.~.~ With vapor-treating devices {7}
200.~.~.~.~.~ Filter

DEFINITION

Classification: 202/200

The vapor from the still or column is passed through porous material or other filter which removes from it entrained particles of liquid and solids. The filtering material in some instances may have a chemical effect.

SEE OR SEARCH CLASS

55, Gas Separation, subclasses following 474 for filter structure for gas.

203, Distillation: Processes, Separatory,

40, for a distillation process including removing entrained particles from a gas or vapor and subclass 41, for a distillation process including utilizing a solid sorbent.

208, Mineral Oils: Processes and Products,

347+,.