US PATENT SUBCLASS 210 / 794
.~.~.~.~.~ Including addition of diverse fluid

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

600  DF  PROCESSES {14}
767  DF  .~ Separating {16}
791  DF  .~.~ Rehabilitating or regenerating filter medium {2}
792  DF  .~.~.~ Particulate bed {2}
793  DF  .~.~.~.~ Reverse flow {1}
794.~.~.~.~.~ Including addition of diverse fluid {1}
795  DF  .~.~.~.~.~.~> Expanded bed

DEFINITION

Classification: 210/794

Including addition of diverse fluid:

(under subclass 793) Process in which the fluid is other than the prefilt and can be a gas.

(1) Note. For purposes of this subclass, the effluent from the filtration step is not considered to be diverse fluid.