US PATENT SUBCLASS 558 / 28
.~.~.~ Having -C(=X)-, wherein X is chalcogen, attached indirectly to the quaternary 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}
27  DF  .~.~ Quaternary nitrogen containing {1}
28.~.~.~ Having -C(=X)-, wherein X is chalcogen, attached indirectly to the quaternary nitrogen

DEFINITION

Classification: 558/28

(under subclass 27) Compounds wherein the quaternary nitrogen is attached indirectly to -C(=X)-, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).

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