US PATENT SUBCLASS 568 / 757
.~.~.~.~.~.~ Nitrogen or phosphorus containing compound utilized

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
300  DF  .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11}
700  DF  .~.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) {10}
715  DF  .~.~.~ Benzene ring containing {8}
716  DF  .~.~.~.~ Phenols (H of -OH may be replaced by a Group IA or IIA light metal) {14}
749  DF  .~.~.~.~.~ Purification or recovery {10}
757.~.~.~.~.~.~ Nitrogen or phosphorus containing compound utilized

DEFINITION

Classification: 568/757

Nitrogen or phosphorus containing compound utilized:

(under subclass 749) Processes wherein a nitrogen or phosphorus containing compound is utilized in the separation.