US PATENT SUBCLASS 430 / 223
.~.~.~.~.~ Redox cleavable dye or dye precursor releaser

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

199  DF  TRANSFER PROCEDURE BETWEEN IMAGE AND IMAGE LAYER, IMAGE RECEIVING LAYERS, OR ELEMENT CONTAINING AN IMAGE RECEIVING LAYER OR AN INGREDIENT FOR FORMING AN IMAGE RECEIVING LAYER {3}
202  DF  .~ Diffusion transfer process, element, or identified image receiving layers therefor {8}
211  DF  .~.~ Element or identified image receiving layers for dye image formation {1}
212  DF  .~.~.~ Element containing silver salt sensitizer or either element or image receiving layer for use therewith {8}
222  DF  .~.~.~.~ Identified dye image forming compound other than colorless color developer or dye mordant containing or identified organic solvent for an incorporated ingredient {3}
223.~.~.~.~.~ Redox cleavable dye or dye precursor releaser

DEFINITION

Classification: 430/223

Redox cleavable dye or dye precursor releaser:

(under subclass 222) Subject matter wherein the dye image forming compound comprises a dye or dye precursor moiety and at lest one other moiety and which upon oxidation or reduction in a medium cleaves to separate the dye or dye precursor moiety from the other moiety and wherein the separated dye or dye precursor moiety has a degree of diffusibility in the element during processing substantially different from the degree of diffusibility of the uncleaved dye image forming compound in the element during processing.

(1) Note. Excluded from herein are elements containing, as the only redox cleavable dye or dye precursor releasing compound, dye image forming compound which may be oxidized during a condensation reaction with another compound and which cleaves off a dye or dye precursor moiety at their condensation reaction sites during the condensation reaction