US PATENT SUBCLASS 540 / 358
.~.~.~.~ The additional chalcogen is sulfur which is bonded directly to chalcogen


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}
200  DF  .~.~ Hetero ring is four-membered containing nitrogen and having chalcogen double bonded directly to a ring carbon which is adjacent to the ring nitrogen {7}
354  DF  .~.~.~ Additional chalcogen bonded directly to the hetero ring {5}
358.~.~.~.~ The additional chalcogen is sulfur which is bonded directly to chalcogen {1}
359  DF  .~.~.~.~.~> The sulfur is double bonded directly to the chalcogen


DEFINITION

Classification: 540/358

(under subclass 354) Compounds wherein the additional chalcogen is sulfur which also is bonded directly to chalcogen (i.e., oxygen, sulfur, selenium or tellurium).

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