US PATENT SUBCLASS 210 / 196
.~ Of filtrate

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

194  DF  RECIRCULATION {3}
196.~ Of filtrate

DEFINITION

Classification: 210/196

(under subclass 194) Apparatus in which filtrate is returned to prefilt.

SEE OR SEARCH THIS CLASS, SUBCLASS:

409+, for a filter with fluid cleaning involving mere return of filtrate for backwashing.