US PATENT SUBCLASS 560 / 78
.~.~.~.~ Purification or recovery

Current as of: June, 1999
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560 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {17}
1  DF  .~ Carboxylic acid esters {14}
8  DF  .~.~ Aromatic acid moiety {9}
76  DF  .~.~.~ Polycarboxylic acid {11}
78.~.~.~.~ Purification or recovery {1}
79  DF  .~.~.~.~.~> Of ester of polyoxy alcohols

DEFINITION

Classification: 560/78

Purification or recovery:

(under subclass 76) Processes which are directed to the purification, separation or recovery of aromatic polycarboxylic acid esters.