US PATENT SUBCLASS 162 / 164.2
.~.~.~ Ion exchange resin or molecular sieve


Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

100  DF  PROCESSES AND PRODUCTS {31}
158  DF  .~ Non-fiber additive {16}
164.1  DF  .~.~ Synthetic resin {9}
164.2.~.~.~ Ion exchange resin or molecular sieve


DEFINITION

Classification: 162/164.2

Ion exchange resin or molecular sieve:

(under subclass 164.1) Subject matter wherein the synthetic resin is a cross-linked polymer carrying acid or basic groups which may be chemically reacted to substitute therefor anions or cations from other substances of opposite polarities, or substances such as some zeolites having channels within their structure large enough to admit small molecules such as water, but not large enough to admit larger molecules of the order of the size of benzene.