US PATENT SUBCLASS 540 / 573
.~.~.~.~.~.~.~ Chalcogen or nitrogen attached indirectly to ring carbon of the hetero ring by acyclic nonionic bonding

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}
553  DF  .~.~.~ The hetero ring contains plural nitrogens (e.g., 1,3-diazepines, etc.) {3}
555  DF  .~.~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos {3}
567  DF  .~.~.~.~.~ Bicyclo ring system which contains the hetero ring as one of the cyclos {2}
569  DF  .~.~.~.~.~.~ 1,4-benzodiazepines (including hydrogenated) {4}
573.~.~.~.~.~.~.~ Chalcogen or nitrogen attached indirectly to ring carbon of the hetero ring by acyclic nonionic bonding

DEFINITION

Classification: 540/573

(under subclass 569) Compounds wherein nitrogen or chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is attached indirectly to ring carbon of the hetero ring by acyclic nonionic bonding.

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