US PATENT SUBCLASS 430 / 339
.~.~ Radiation sensitive bleachable dyestuff

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

332  DF  DYE IMAGE FROM RADIATION SENSITIVE DYE OR DYE FORMER BY DRY PROCESSING, COMPOSITION, OR PRODUCT {6}
338  DF  .~ Composition or product {3}
339.~.~ Radiation sensitive bleachable dyestuff

DEFINITION

Classification: 430/339

Radiation sensitive bleachable dyestuff:

(under subclass 338) Compositions containing a compound having a chromophore group such as an azo moiety, which upon exposure to electromagnetic radiation becomes colorless or less brightly colored.