US PATENT SUBCLASS 210 / 629
.~.~.~ And internally circulating the liquid

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

600  DF  PROCESSES {14}
601  DF  .~ Treatment by living organism {13}
620  DF  .~.~ Aerobic treatment {3}
629.~.~.~ And internally circulating the liquid

DEFINITION

Classification: 210/629

An internally circulating the liquid:

(under subclass 620) Process which includes a step of agitating or imparting movement of material within a vessel, other than mere flow through from inlet to outlet.