US PATENT SUBCLASS 528 / 144
.~.~.~.~ Material contains a carboxylic acid, anhydride thereof, ester thereof, or salt thereof

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}
86  DF  .~ FROM PHENOL, PHENOL ETHER, OR INORGANIC PHENOLATE {15}
129  DF  .~.~ With aldehyde or derivative {18}
137  DF  .~.~.~ Polymerizing in the presence of a specified material other than a reactant {9}
144.~.~.~.~ Material contains a carboxylic acid, anhydride thereof, ester thereof, or salt thereof

DEFINITION

Classification: 528/144

(under subclass 137) Subject matter wherein the specified material is a carboxylic acid, ester thereof, salt thereof, or anhydride thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271, for a definition of the term " carboxylic acid salt or anhydride".

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for a definition of the term "carboxylic acid or derivative".