US PATENT SUBCLASS 424 / 78.27
.~.~.~.~ Nitrogen or sulfur

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

78.08  DF  SOLID SYNTHETIC ORGANIC POLYMER AS DESIGNATED ORGANIC ACTIVE INGREDIENT (DOAI) {6}
78.17  DF  .~ Aftertreated polymer (e.g., grafting, blocking, etc.) {2}
78.18  DF  .~.~ Polymer derived from ethylenic monomers only {2}
78.26  DF  .~.~.~ Chemical treating agent contains element other than C, H, O, alkali, or alkaline earth metal {1}
78.27.~.~.~.~ Nitrogen or sulfur {2}
78.28  DF  .~.~.~.~.~> Sulfur heterocycle
78.29  DF  .~.~.~.~.~> Nitrogen heterocycle

DEFINITION

Classification: 424/78.27

Nitrogen or sulfur:

(under subclass 78.26) Subject matter wherein the chemical treating agent contains either nitrogen or sulfur; e.g., the chemical aftertreatment of polyhydroxyethyl methacrylate first with cyanogen bromide and then with heparin or antithrombin III, etc.