US PATENT SUBCLASS 556 / 19
.~.~.~ Carbon bonded directly to the phosphorus

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}
1  DF  .~ HEAVY METAL CONTAINING (e.g., Ga, In or T1, etc.) {19}
13  DF  .~.~ Phosphorus containing {6}
19.~.~.~ Carbon bonded directly to the phosphorus {1}
20  DF  .~.~.~.~> Plural carbons bonded directly to the phosphorus {1}

DEFINITION

Classification: 556/19

(under subclass 13) Compounds wherein carbon is bonded directly to the phosphorus.