US PATENT SUBCLASS 562 / 580
.~.~.~.~ 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}
579  DF  .~.~.~ Oxy {7}
580.~.~.~.~ Purification or recovery per se

DEFINITION

Classification: 562/580

Purification or recovery, per se:

(under subclass 579) Processes directed to the purification, separation, or recovery of an acyclic oxy carboxylic acid.

(1) Note. See subclass 515 for recovery of acyclic oxy carboxylic acids resulting from the degradation of carbohydrates.

(2) Note. See subclasses 401+ for the separation of optical isomers of acyclic oxy carboxylic acids.

SEE OR SEARCH CLASS

29, Metal Working,

25.35, and the classes referred to in the search notes of that subclass for processes of and apparatus for the manufacture of piezoelectric crystals of Rochelle salt by procedures which include crystallizing and additional manufacturing operations.