US PATENT SUBCLASS 528 / 274
.~.~.~ Polymerizing in the presence of a specified material other than reactant

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}
274.~.~.~ Polymerizing in the presence of a specified material other than reactant {2}
275  DF  .~.~.~.~> Material contains a metal atom {6}
286  DF  .~.~.~.~> Material contains a phosphorus atom

DEFINITION

Classification: 528/274

(under subclass 272) Subject matter wherein (1) one or more di- or higher esters of a carboxylic as sole reactant, or (2) a polycarboxylic acid or derivative thereof and a reactant containing two or more hydroxyl groups or salts thereof are polymerized in the presence of a specified material.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for an explanation of the term "specified material".