US PATENT SUBCLASS 562 / 494
.~.~.~.~ Purification or recovery per se

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}
493  DF  .~.~.~ Monocyclic {3}
494.~.~.~.~ Purification or recovery per se

DEFINITION

Classification: 562/494

Purification or recovery, per se:

(under subclass 493) Processes directed to the purification, separation, or recovery of aromatic monocyclic monocarboxylic acids.