US PATENT SUBCLASS 514 / 437
.~.~.~.~ Tricyclo ring system having the hetero ring as one of the cyclos

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}
430  DF  .~.~ Sulfur containing hetero ring {3}
432  DF  .~.~.~ The hetero ring is six-membered {2}
437.~.~.~.~ Tricyclo ring system having the hetero ring as one of the cyclos

DEFINITION

Classification: 514/437

Tricyclo ring system having the hetero ring as one of the cyclos:

(under subclass 432) Subject matter wherein the hetero ring is one of the cyclos of a polycyclo ring system consisting of exactly three cyclos.