US PATENT SUBCLASS 210 / 678
.~.~.~ Including liquid flow direction change

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

600  DF  PROCESSES {14}
660  DF  .~ Ion exchange or selective sorption {8}
670  DF  .~.~ Including rehabilitating or regenerating exchange material or sorbent {7}
678.~.~.~ Including liquid flow direction change

DEFINITION

Classification: 210/678

Including liquid flow direction change:

(under subclass 670) Process including a flow of fluid through the separatory material in a direction different from the flow of liquid during the separating treatment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

275+, for backwash or blowback means combined with a particular material-type separator.

420+, for a filter with valve means providing selective directive flow relative to the filter.