US PATENT SUBCLASS 568 / 2
.~.~ Phosphorus containing

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}
1  DF  .~ BORON CONTAINING {4}
2.~.~ Phosphorus containing

DEFINITION

Classification: 568/2

(under subclass 1) Compounds which contain phosphorus.