US PATENT SUBCLASS 558 / 199
.~.~ Nitrogen bonded directly to the phosphorus


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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
70  DF  .~ Phosphorus esters (i.e., compounds having the phosphorus ester group, wherein trivalent or pentavalent phosphorus and carbon are bonded directly to the same divalent chalcogen, and wherein the carbon may be single bonded to any atom but may be multiple bonded only to carbon) {18}
199.~.~ Nitrogen bonded directly to the phosphorus {2}
200  DF  .~.~.~> Benzene ring and the phosphorus bonded directly to the same chalcogen (i.e., the carbon of the phosphorus ester group is part of a benzene ring)
201  DF  .~.~.~> Acyclic carbon chain containing carbon to carbon unsaturation attached indirectly to the phosphorus by acyclic nonionic bonding


DEFINITION

Classification: 558/199

(under subclass 70) Compounds wherein the phosphorus is bonded directly to nitrogen.

(1) Note. An example of a compound provided for herein is: [figure]