US PATENT SUBCLASS 210 / 791
.~.~ Rehabilitating or regenerating filter medium

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

600  DF  PROCESSES {14}
767  DF  .~ Separating {16}
791.~.~ Rehabilitating or regenerating filter medium {2}
792  DF  .~.~.~> Particulate bed {2}
797  DF  .~.~.~> By diverse fluid {1}

DEFINITION

Classification: 210/791

Rehabilitating or regenerating filter medium:

(under subclass 767) Process in which a residue is removed from or redistributed through a filter medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

269+, for apparatus provided with means to restore the filter medium to the condition it was in before separation.

391+, for a movable separation medium having means for removing residue.

407+, for apparatus having means for removing residue from the filter medium.

420+, for a filter with means to clean by backwashing.

777, for precoat processes many of which remove the precoat and deposit. 779, for processes including discharging residue to prefilt.

780+, in which movement of the filter may prevent clogging of the filter medium.

785, for processes including cleaning the filter medium by electrical or wave energy.