US PATENT SUBCLASS 560 / 76
.~.~.~ 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}
76.~.~.~ Polycarboxylic acid {11}
77  DF  .~.~.~.~> Producing carboxyl group by oxidation
78  DF  .~.~.~.~> Purification or recovery {1}
80  DF  .~.~.~.~> Ortho fused rings in acid moiety
81  DF  .~.~.~.~> Esterified carboxy not bonded directly to a ring {1}
83  DF  .~.~.~.~> Halogen in acid moiety
84  DF  .~.~.~.~> Ring in alcohol moiety {1}
87  DF  .~.~.~.~> Sulfur or halogen in alcohol moiety
88  DF  .~.~.~.~> Nitrogen in alcohol moiety
89  DF  .~.~.~.~> Polyoxy alcohol moiety {5}
95  DF  .~.~.~.~> Unsaturation in alcohol moiety
96  DF  .~.~.~.~> Processes {2}

DEFINITION

Classification: 560/76

Polycarboxylic acid:

(under subclass 8) Compounds wherein the acid radical contains more than one carboxyl group, at least one of which is esterified.

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

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