US PATENT SUBCLASS 430 / 589
.~.~.~.~.~.~.~ Direct positive

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}
581  DF  .~.~.~ Cyanine sensitizer {2}
583  DF  .~.~.~.~ Containing odd number of methine groups {2}
585  DF  .~.~.~.~.~ Three methine groups, i.e., carbocyanines {4}
588  DF  .~.~.~.~.~.~ Hetero rings bridged or fused to carbocyclic rings {1}
589.~.~.~.~.~.~.~ Direct positive

DEFINITION

Classification: 430/589

Direct positive:

(under subclass 588) Subject matter which produces a positive image when subjected to a post-imaging development (finishing) process without the intermediate production of a separate negative image.