US PATENT SUBCLASS 210 / 334
.~.~.~ Alternating filter and residue remover

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

322  DF  PLURAL DISTINCT SEPARATORS {1}
323.1  DF  .~ Filters {10}
332  DF  .~.~ With residue removal or liquid agitation {2}
334.~.~.~ Alternating filter and residue remover

DEFINITION

Classification: 210/334

(under subclass 332) Apparatus in which the filter units and cleaning means are arranged in alternation.