US PATENT SUBCLASS 560 / 54
.~.~.~.~ 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}
8  DF  .~.~ Aromatic acid moiety {9}
51  DF  .~.~.~ Aldehyde or ketone group in acid moiety {3}
54.~.~.~.~ Polycarboxylic acid

DEFINITION

Classification: 560/54

Polycarboxylic acid:

(under subclass 51) Compounds wherein the acid radical contains more than one carboxyl group, at least one of which is esterified.

(1) Note. This subclass contains compounds wherein an unesterified carboxyl may be present in free acid form or in the form of a salt or an acid halide. When the unesterified carboxyl is converted into an amide, the compound is classifiable in the appropriate subclass under (19).

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