US PATENT SUBCLASS 210 / 652
.~.~.~.~ Hyperfiltration (e.g., reverse osmosis, etc.)

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}
649  DF  .~.~ Diffusing or passing through septum selective as to material of a component of liquid {1}
650  DF  .~.~.~ Filtering through membrane (e.g., ultrafiltration) {2}
652.~.~.~.~ Hyperfiltration (e.g., reverse osmosis, etc.) {1}
653  DF  .~.~.~.~.~> Utilizing specified membrane material {2}

DEFINITION

Classification: 210/652

Hyperfiltration (e.g., reverse osmosis, etc.):

(under subclass 650) Process in which dissolved material (i.e., including ionic) is removed from a liquid.

(1) Note. Reverse osmosis is the usual process for which this subclass provides. See OSMOSIS under the GLOSSARY.