US PATENT SUBCLASS 560 / 176
.~.~.~.~ Polycarboxylic acid

Current as of: June, 1999
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560 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {17}
1  DF  .~ Carboxylic acid esters {14}
129  DF  .~.~ Acyclic acid moiety {9}
174  DF  .~.~.~ Aldehyde or ketone group in acid moiety {4}
176.~.~.~.~ Polycarboxylic acid

DEFINITION

Classification: 560/176

Polycarboxylic acid:

(under subclass 174) Compounds wherein the acid radical contains more than one carboxyl group, at least one of which is esterified.

(1) Note. This subclass also includes compounds wherein any unesterified carboxyl group may be present in free acid form or has been converted into a salt or acid halide. Where the carboxyl group has been converted into an amide, the compound is classified in subclasses 155+.

(2) Note. This subclass contains, for example: [figure] [figure]