US PATENT SUBCLASS 528 / 304
.~.~.~.~.~ Aryl-containing carboxylic acid or derivative of an aryl-containing carboxylic acid


Current as of: June, 1999
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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  DF  .~.~.~ Two or more carboxylic acid or derivatives or mixtures thereof {2}
303  DF  .~.~.~.~ Ethylenically unsaturated carboxylic acid or ethylenically unsaturated derivative {1}
304.~.~.~.~.~ Aryl-containing carboxylic acid or derivative of an aryl-containing carboxylic acid


DEFINITION

Classification: 528/304

(under subclass 303) Subject matter wherein (1) at least one reactant is an ethylenically unsaturated aromatic carboxylic acid or is a derivative thereof, or (2) the mixture contains as a reactant at least one ethylenically unsaturated carboxylic acid or derivative thereof, and at least one aryl-containing carboxylic acid or derivative thereof.