US PATENT SUBCLASS 558 / 30
.~.~.~ 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}
20  DF  .~ Sulfate esters ( i.e., compounds having the sulfate group, -O-S(=O)(=O)O-, bonded directly to at least one carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {11}
29  DF  .~.~ Nitrogen attached indirectly to the sulfate group by acyclic nonionic bonding {1}
30.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the nitrogen

DEFINITION

Classification: 558/30

(under subclass 29) Compounds wherein the nitrogen is bonded directly to -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium). [figure]