US PATENT SUBCLASS 540 / 555
.~.~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos


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.~.~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos {3}
556  DF  .~.~.~.~.~> Two of the cyclos share at least three ring members or a ring member is shared by three of the cyclos (e.g., bridged, peri-fused, etc.)
557  DF  .~.~.~.~.~> Tricyclo ring system which contains the hetero ring as one of the cyclos {1}
567  DF  .~.~.~.~.~> Bicyclo ring system which contains the hetero ring as one of the cyclos {2}


DEFINITION

Classification: 540/555

(under subclass 553) Compounds wherein the hetero ring is one of the cyclos of a polycyclo ring system.

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

[figure]