US PATENT SUBCLASS 556 / 174
.~.~ Phosphorus containing

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {3}
170  DF  .~ ALUMINUM CONTAINING {11}
174.~.~ Phosphorus containing

DEFINITION

Classification: 556/174

(under subclass 170) Compounds which contain phosphorus.