US PATENT SUBCLASS 560 / 171
.~.~.~.~ 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}
155  DF  .~.~.~ Nitrogen in acid moiety other than as nitroso or isocyanate (e.g., amino acid esters, etc.) {8}
171.~.~.~.~ Polycarboxylic acid

DEFINITION

Classification: 560/171

Polycarboxylic acid:

(under subclass 155) 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 appear in free acid form or has been converted into a salt or acid halide.

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