US PATENT SUBCLASS 562 / 608
.~.~.~.~.~ 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}
606  DF  .~.~.~ Saturated lower fatty acids {2}
607  DF  .~.~.~.~ Acetic acid per se or salt thereof {1}
608.~.~.~.~.~ Purification or recovery per se

DEFINITION

Classification: 562/608

Purification or recovery, per se:

(under subclass 607) Processes directed to the purification, separation, or recovery of acetic acid.

(1) Note. See subclass 513 for the recovery of acetic acid from sources of undetermined composition; and subclass 515 for the recovery of acetic acid resulting from degradation of carbohydrates.

(2) Note. See (1) Note (b) under subclass 400 for the placement of patents claiming the purification or recovery of an acid combined with a salt forming or salt hydrolysis step.