US PATENT SUBCLASS 514 / 253
.~.~.~.~ Hetero ring other than 1,2- or 1,4-diazine is part of a polycyclo ring system

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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}
247  DF  .~.~ Hetero ring is six-membered consisting of two nitrogens and four carbon atoms (e.g., pyridazines, etc.) {4}
252  DF  .~.~.~ 1,2- or 1,4-diazine compound having two or more hetero rings {1}
253.~.~.~.~ Hetero ring other than 1,2- or 1,4-diazine is part of a polycyclo ring system {1}
254  DF  .~.~.~.~.~> Diazine is bonded directly to the polycyclo ring system

DEFINITION

Classification: 514/253

Hetero ring other than 1,2- or 1,4-diazine is part of a polycyclo ring system:

(under subclass 252) Subject matter wherein the heterocyclic substituent is a part of a polycyclo substituent, e.g., [figure] [caption], etc.