US PATENT SUBCLASS 560 / 190
.~.~.~ 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}
190.~.~.~ Polycarboxylic acid {11}
191  DF  .~.~.~.~> Purification or recovery
192  DF  .~.~.~.~> Halogen in acid moiety
193  DF  .~.~.~.~> Cyclic alcohol moiety {1}
195  DF  .~.~.~.~> Phosphorus or sulfur in alcohol moiety
196  DF  .~.~.~.~> Nitrogen in alcohol moiety
197  DF  .~.~.~.~> Halogen in alcohol moiety
198  DF  .~.~.~.~> Polyoxy alcohol moiety {2}
201  DF  .~.~.~.~> Unsaturation in alcohol moiety
202  DD  .~.~.~.~> Preparing esters by oligomerization
203  DD  .~.~.~.~> Preparing esters by alkylation or isomerization
204  DD  .~.~.~.~> Preparing esters by esterification or carbonylation

DEFINITION

Classification: 560/190

Polycarboxylic acid:

(under subclass 129) Compounds which contain 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 has been converted into a salt or an acid halide. Where an unesterified carboxyl has been converted into an amide, see subclasses 155+.

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