US PATENT SUBCLASS 560 / 44
.~.~.~.~.~ 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}
19  DF  .~.~.~ Nitrogen in acid moiety other than as nitroso or isocyanate (e.g., amino acid esters, etc.) {12}
43  DF  .~.~.~.~ The nitrogen is bonded directly to a ring and is in same side chain as ester function {1}
44.~.~.~.~.~ Polycarboxylic acid

DEFINITION

Classification: 560/44

Polycarboxylic acid:

(under subclass 43) Compounds wherein the acid radical has more than one carboxyl group, at least one of which is esterified.

(1) Note. This subclass also contains compounds wherein an unesterified carboxyl has been converted into a salt or an acid halide, or may be in the free acid form. Where the unesterified carboxyl is converted into an amide, the compound is classified in subclass 43.

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