US PATENT SUBCLASS 540 / 608
.~.~.~.~ Chalcogen bonded directly to the -C(=X)- group

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
484  DF  .~.~ The hetero ring contains seven members including nitrogen and carbon {14}
607  DF  .~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to nitrogen of the hetero ring {1}
608.~.~.~.~ Chalcogen bonded directly to the -C(=X)- group

DEFINITION

Classification: 540/608

(under subclass 607) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the - - group.

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