US PATENT SUBCLASS 562 / 593
.~.~.~.~ 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}
512  DF  .~.~ Acyclic {14}
590  DF  .~.~.~ Polycarboxylic {7}
593.~.~.~.~ Purification or recovery per se

DEFINITION

Classification: 562/593

Purification or recovery, per se:

(under subclass 590) Processes directed to the purification, separation, or recovery of acyclic polycarboxylic acids.

(1) Note. See subclasses 513 and 515 for purification or recovery of acyclic polycarboxylic acids from sources of undetermined compositions or from the degradation of carbohydrates, respectively.