US PATENT SUBCLASS 528 / 302
.~.~.~ Two or more carboxylic acid or derivatives or mixtures thereof

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

Internet Version by PATENTEC © 1999      Terms of Use


528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
271  DF  .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10}
272  DF  .~.~ From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof {15}
302.~.~.~ Two or more carboxylic acid or derivatives or mixtures thereof {2}
303  DF  .~.~.~.~> Ethylenically unsaturated carboxylic acid or ethylenically unsaturated derivative {1}
305  DF  .~.~.~.~> Each of the carboxylic acids or derivatives contains an aryl group

DEFINITION

Classification: 528/302

(under subclass 272) Subject matter wherein a reactant mixture contains two or more carboxylic acids, or at least two carboxylic acid derivatives, or a mixture of at least one carboxylic acid and a carboxylic acid derivative.