US PATENT SUBCLASS 514 / 291
.~.~.~.~.~ Plural hetero atoms in the tricyclo ring system

Current as of: June, 1999
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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
183  DF  .~ Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the only ring hetero atoms DOAI {16}
277  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbon atoms {11}
279  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {4}
290  DF  .~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos {6}
291.~.~.~.~.~ Plural hetero atoms in the tricyclo ring system {1}
292  DF  .~.~.~.~.~.~> Plural ring nitrogens in the tricyclo ring system {1}

DEFINITION

Classification: 514/291

Plural hetero atoms in the tricyclo ring system:

(under subclass 290) Subject matter wherein the tricyclo ring system contains at least one ring hetero atom in addition to the ring nitrogen of the six-membered hetero ring.