US PATENT SUBCLASS 558 / 159
.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the nitrogen

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}
155  DF  .~.~ Plural phosphori attached directly or indirectly to each other by nonionic bonding {1}
156  DF  .~.~.~ Plural phosphorus ester groups {4}
158  DF  .~.~.~.~ Nitrogen attached indirectly to phosphorus by acyclic nonionic bonding {1}
159.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the nitrogen

DEFINITION

Classification: 558/159

(under subclass 158) Compounds which contain the -C(=X)- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), bonded directly to the nitrogen.

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