US PATENT SUBCLASS 562 / 554
.~.~.~.~ 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}
553  DF  .~.~.~ Nitrogen bonded to carbon of organic radical (e.g., amino acids, etc.) {10}
554.~.~.~.~ Purification or recovery per se

DEFINITION

Classification: 562/554

Purification or recovery, per se:

(under subclass 553) Processes directed to the purification, separation, or recovery of nitrogen containing acyclic carboxylic acids.

(1) Note. See subclasses 516 for purification or recovery of amino acids from protein hydrolysates.

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