US PATENT SUBCLASS 562 / 479
.~.~.~ Decarboxylation of polycarboxylic acid or salt

Current as of: June, 1999
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562 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
400  DF  .~ Carboxylic acids and salts thereof {14}
405  DF  .~.~ Aromatic {13}
479.~.~.~ Decarboxylation of polycarboxylic acid or salt

DEFINITION

Classification: 562/479

Decarboxylation of polycarboxylic acid or salt:

(under subclass 405) Processes wherein a carboxyl group of a polycarboxylic acid or an anhydride thereof is destroyed to produce an aromatic carboxylic acid, as for example, the production of benzoic acid from phthalic acid.