US PATENT SUBCLASS 540 / 529
.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the hetero ring

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}
485  DF  .~.~.~ Chalcogen double bonded directly to a ring carbon adjacent to the ring nitrogen (e.g., caprolactam, etc.) {15}
529.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the hetero ring

DEFINITION

Classification: 540/529

(under subclass 485) Compounds in which- C - where X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), is

bonded directly to the hetero ring.

(1) Note. Examples of compounds provided for herein are: [figure]