US PATENT SUBCLASS 424 / 78.13
.~.~.~ Oxygen or sulfur heterocycle

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  DF  .~.~ Adsorbate or treating agent contains nitrogen {3}
78.13.~.~.~ Oxygen or sulfur heterocycle

DEFINITION

Classification: 424/78.13

Oxygen or sulfur heterocycle:

(under subclass 78.12) Subject matter wherein the adsorbate or chemical treating agent contains an oxygen or sulfur heterocycle; e.g., epichlorohydrin, dithiazanine, dihydrocodeinone (hydrocodone), etc.