US PATENT SUBCLASS 514 / 249
.~.~.~.~ 1,4-diazine 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}
247  DF  .~.~ Hetero ring is six-membered consisting of two nitrogens and four carbon atoms (e.g., pyridazines, etc.) {4}
248  DF  .~.~.~ Polycyclo ring system having a 1,2- or 1,4-diazine as one of the cyclos {1}
249.~.~.~.~ 1,4-diazine as one of the cyclos {1}
250  DF  .~.~.~.~.~> At least three rings in the polycyclo ring system {1}

DEFINITION

Classification: 514/249

1,4-diazine as one of the cyclos:

(under subclass 248) Subject matter wherein a 1,4-diazine ring is a part of the fused or bridged ring system.