US PATENT SUBCLASS 562 / 591
.~.~.~.~ Preparation by isomerization

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}
512  DF  .~.~ Acyclic {14}
590  DF  .~.~.~ Polycarboxylic {7}
591.~.~.~.~ Preparation by isomerization

DEFINITION

Classification: 562/591

Preparation by isomerization:

(under subclass 590) Processes wherein the acid is prepared by isomerization, as for example, the preparation of fumaric acid by isomerizing maleic acid.