US PATENT SUBCLASS 521 / 28
.~.~ Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymer

Current as of: June, 1999
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521 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
25  DF  .~ ION-EXCHANGE POLYMER OR PROCESS OF PREPARING {7}
28.~.~ Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymer

DEFINITION

Classification: 521/28

(under subclass 25) Subject matter wherein a previously formed solid ion-exchange polymer is admixed with (1) a different ion-exchange polymer, or (2) with a material which is inert towards the ion-exchange polymer and wherein there is an intent to form a desirous composition therewith.

(1) Note. The material admixed with the ion-exchange polymer as in (2) above can include materials capable of becoming ion-exchange materials on further processing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25+, for an admixture of an ion-exchange material and a material which is inert to the ion-exchange material and is intended to be removed in a later processing operation.

30+, for an admixture of an ion-exchange material and a reactant which is intended to chemically modify the ion-exchange polymer.