US PATENT SUBCLASS 528 / 148
.~.~.~ Phenolic reactant contains a carboxylic acid or carboxylic acid salt group

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}
148.~.~.~ Phenolic reactant contains a carboxylic acid or carboxylic acid salt group

DEFINITION

Classification: 528/148

(under subclass 129) Subject matter wherein a phenol, phenol ether, or inorganic phenolate containing a carboxylic acid group or a salt of a carboxylic acid group is reacted with an aldehyde or derivative.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

SEE OR SEARCH CLASS

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