US PATENT SUBCLASS 430 / 615
.~.~.~.~.~ Polyhetero atom ring fused to another ring having polyhetero atoms

Current as of: June, 1999
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430 /   HD   RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF

495.1  DF  RADIATION SENSITIVE PRODUCT {7}
564  DF  .~ Silver compound sensitizer containing {18}
607  DF  .~.~ Stabilizing or fog inhibiting ingredient containing {6}
613  DF  .~.~.~ Heterocyclic compound {1}
614  DF  .~.~.~.~ Polyhetero atom ring {1}
615.~.~.~.~.~ Polyhetero atom ring fused to another ring having polyhetero atoms

DEFINITION

Classification: 430/615

Polyhetero atom ring fused to another ring having polyhetero atoms:

(under subclass 614) Subject matter containing a compound in which two heterocyclic ring which each contain more than one atom other than carbon are fused to each other, e.g., tetraaza-or pentaazaindanes, etc.