US PATENT SUBCLASS 514 / 298
.~.~.~.~.~ Phenanthridines (including hydrogenated)

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}
298.~.~.~.~.~ Phenanthridines (including hydrogenated)

DEFINITION

Classification: 514/298

Phenathridines (including hydrogenated):

(under subclass 290) Subject matter wherein the tricyclo ring system has the following structure, which may contain double bonds between ring members: [figure]