US PATENT SUBCLASS 210 / 777
.~.~ Including precoating filter medium with filter aid

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
767  DF  .~ Separating {16}
777.~.~ Including precoating filter medium with filter aid {1}
778  DF  .~.~.~> With or by addition to prefilt

DEFINITION

Classification: 210/777

Including precoating filter medium with filter aid:

(under subclass 767) Process in which a basic separating member or retainer is coated with a filter medium or filter aid prior to the purification step.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193, for precoat adding means.

500+, for precoat material or filter aid.

SEE OR SEARCH CLASS

427, Coating Processes, for coating processes, per se, and note especially

180+, for coating with particles or fibers.