US PATENT SUBCLASS 210 / 663
.~.~ Including diverse separating or treating of liquid

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}
663.~.~ Including diverse separating or treating of liquid {4}
664  DF  .~.~.~> By distilling or degassing
665  DF  .~.~.~> By making an insoluble substance or accreting suspended constituents {2}
668  DF  .~.~.~> By chemically modifying or inhibiting dispersed constituent
669  DF  .~.~.~> Prior to ion exchange or sorption

DEFINITION

Classification: 210/663

Including diverse separating or treating of liquid:

(under subclass 660) Process in which the liquid being treated is subjected to an additional operation other than ion exchange or sorption, which operation (a) removes constituents from the liquid, or (b) neutralizes or inhibits the effects of constituents in the liquid.

(1) Note. The additional treatment may be prior to, or subsequent to the ion exchange or sorption treatment.

(2) Note. Plural ion exchange or sorption treatments, or ion exchange in combination with sorption treatments, are not classified in this subclass unless additional other

treatments are also provided.

(3) Note. A process of retaining exchange or sorbent material by screening subsequent to agitation of loose such material in a liquid is not considered to be a separate treating.

SEE OR SEARCH THIS CLASS, SUBCLASS:

638, for an ion exchange process combined with liquid/liquid separation or with use of a semipermeable membrane.