US PATENT SUBCLASS 210 / 765
.~.~ Including liquid recirculation

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

600  DF  PROCESSES {14}
749  DF  .~ Chemical treatment {8}
765.~.~ Including liquid recirculation

DEFINITION

Classification: 210/765

With liquid recirculation:

(under subclass 749) Process including a step of recirculating all or part of the liquid being treated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194+, for apparatus including means for recirculating.

621+, for a process by treatment with aerobic living organisms including recirculation.

712+, for a precipitation process including recirculation.