US PATENT SUBCLASS 514 / 662
.~.~.~.~ 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}
579  DF  .~ Nitrogen containing other than solely as a nitrogen in an inorganic ion of an addition salt, a nitro or a nitroso DOAI {22}
660  DF  .~.~ Plural alicyclic rings {1}
661  DF  .~.~.~ Polycyclo ring system {1}
662.~.~.~.~ Tricyclo ring system

DEFINITION

Classification: 514/662

Tricyclo ring system:

(under subclass 661) Subject matter wherein the polycyclo ring system contains three rings in the polycyclo ring system.