US PATENT SUBCLASS 430 / 579
.~.~.~.~ Four or more distinct heterocyclic nuclei

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}
578  DF  .~.~.~ Polyhetero nuclear containing at least three heterocyclic nuclei {1}
579.~.~.~.~ Four or more distinct heterocyclic nuclei

DEFINITION

Classification: 430/579

Four or more distinct heterocyclic nuclei:

(under subclass 578) Subject matter in which the added material contains at least four distinct heterocyclic nuclei.