US PATENT SUBCLASS 430 / 593
.~.~.~.~.~ Methine linked hetero ring with hetero group bridged or fused thereto

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}
570  DF  .~.~ Spectral sensitizing {6}
591  DF  .~.~.~ Two or more separate ring structures {1}
592  DF  .~.~.~.~ Intercyclic methine chain sensitizer {3}
593.~.~.~.~.~ Methine linked hetero ring with hetero group bridged or fused thereto

DEFINITION

Classification: 430/593

Methine linked hetero ring with hetero group bridged or fused thereto:

(under subclass 592) Subject matter in which at least one of the distinct cyclic nuclei is a heterocyclic nucleus which is fused or bridged to a second heterocyclic moiety which has its own hetero atom or which shares at least one of the hetero atoms of the methine-linked heterocyclic ring, e.g., [figure]