US PATENT SUBCLASS 210 / 637
.~.~ Including regulating pressure to control constituent gradient at membrane or to prevent rupture of membrane

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

600  DF  PROCESSES {14}
634  DF  .~ Liquid/liquid solvent or colloidal extraction or diffusing or passing through septum selective as to material of a component of liquid; such diffusing or passing being effected by other than only an ion exchange or sorption process {11}
637.~.~ Including regulating pressure to control constituent gradient at membrane or to prevent rupture of membrane

DEFINITION

Classification: 210/637

Including regulating pressure to control constituent gradient at membrane or to prevent rupture of membrane:

(under subclass 634) Process in which the force driving the liquid to be treated or a counter force of an effluent is controlled or varied such that (a) the concentration of a constituent in adjacent layers is maintained at a desirable level, or (b) the burst strength of a septum is not exceeded.

(1) Note. Some examples of the art classifiable in this subclass are pulsating or oscillating the feed in a dialysis method to prevent buildup of a rejected constituent on the upstream side and partially equalizing of the pressure on the downstream side of a reverse osmosis membrane.

SEE OR SEARCH CLASS

364, Electrical Computers and Data Processing Systems,

528.01+, for a computerized monitoring of a chemical process.