US PATENT SUBCLASS 424 / 78.12
.~.~ Adsorbate or treating agent contains nitrogen

Current as of: June, 1999
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424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

78.08  DF  SOLID SYNTHETIC ORGANIC POLYMER AS DESIGNATED ORGANIC ACTIVE INGREDIENT (DOAI) {6}
78.1  DF  .~ Ion exchange resin {2}
78.12.~.~ Adsorbate or treating agent contains nitrogen {3}
78.13  DF  .~.~.~> Oxygen or sulfur heterocycle
78.14  DF  .~.~.~> Nitrogen heterocycle {1}
78.16  DF  .~.~.~> Amine containing aromatic group

DEFINITION

Classification: 424/78.12

Adsorbate or treating agent contains nitrogen:

(under subclass 78.1) Subject matter wherein the composition contains an ion exchange resin DOAI whose preparation involved either a nitrogen containing treating agent; e.g., the quaternization with dimethyl amine of chloromethylated polystyrene-divinyl benzene or the chemical addition (adsorbate) of an active agent; e.g., the aftertreatment of polyacrylic acid-divinyl benzene with oxytetracycline, etc.

(1) Note. It is not essential that either the adsorbate or treating agent impart ion exchange capacity to the resin so long as the final product contains these characteristics.

(2) Note. The adsorbate or treating agent can be regarded as such only with reference to a solid organic polymer, otherwise they must be construed as a reactant to form a solid organic polymer or precursor thereof.