Patent US4600681A successfully refreshed from Google Patents.
US4600681A
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Color photographic material with azo dicyanoimidazole dyes
Assignee: Agfa Gevaert AG
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Filing: 1985-06-26
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Granted: 1986-07-15
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Expires: 2005-06-26
Abstract
Abstract Metal complexes, particularly copper and nickel complexes of azo dyes corresponding to general formula (I) are suitable as color dyes for the production of color images by the dye diffusion transfer process. The dyes are (in non-metallized form), in the form of so-called "dye-releasers", bound to a redox-active carrier radical provided with a ballast group, which dye-releasers are associated to a light-sensitive silver halide emulsion layer. During development, the metallizable dyes are image-wise released and are converted, after diffusion into a light-receiving layer, into the corresponding metal complexes ##STR1## wherein E represents an electron acceptor radical; and K represents the radical of an azo coupler component, derived from an open-chain or closed ring ketomethylene compound, a cyclic enamine compound or a phenolic compound.
Inventors
- 👤 Peter Bergthaller
- 👤 Jurgen Strauss
- 👤 Hans-Volker Runzheimer
- 👤 Gerhard Wolfrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:23
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; C; C09; C09B; C09B29/00; C09B29/0025; C09B29/0029; C09B29/0037
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A colour photographic recording material for the production of colour images by the dye diffusion transfer process, which material contains a non-diffusing dye-providing compound associated to at least one light-sensitive silver halide emulsion layer, from which compound a diffusible azo dye which is complexable by metal ions is released under the condition of alkaline development as a function of the development of the silver halide emulsion layer, wherein the improvement comprises the azo dye corresponds to the following general formula (I): ##STR14## wherein E represents an electron acceptor radical selected from the group consisting of cyano and, carboxy or carbamoyl hydrolysis derivatives of cyano and K represents the radical of an azo coupling component, which is derived from an open-chain or closed ring ketomethylene compound, a cyclic enamine compound or a phenolic compound.
Claim 2
Dependent Claim
133 words
A colour photographic recording material for the production of colour images by the dye diffusion transfer process, which material contains a non-diffusing dye-providing compound associated to at least one light-sensitive silver halide emulsion layer, from which compound a diffusible azo dye which is complexable by metal ions is released under the condition of alkaline development as a function of the development of the silver halide emulsion layer, wherein the improvement comprises the azo dye corresponds to the following general formula (I): ##STR14## wherein E represents an electron acceptor radical selected from the group consisting of cyano and, carboxy or carbamoyl hydrolysis derivatives of cyano and K represents the radical of an azo coupling component, which is derived from an open-chain or closed ring ketomethylene compound, a cyclic enamine compound or a phenolic compound.
Claim 3
Independent Claim
125 words
The method of producing an image by dye diffusion processing of an image-wise exposed color photographic material containing associated with at least one sensitive silver halide emulsion layer, a non-diffusible dye color providing compound while in contact with an image receptor layer, the method comprising the step of releasing from said non-diffusible dye color providing compound under alkaline development conditions an image dye comprising the azo dye corresponding to the following general formula ##STR15## wherein E represents an electron acceptor radical selected from the group consisting of cyano, and carboxy, or carbamoyl hydrolysis derivatives of cyano; and K represents the radical of an azo coupling component, which is derived from an open-chain or closed ring ketomethylene compound, a cyclic enamine compound or a phenolic compound.
Claim 4
Independent Claim
125 words
The method of producing an image by dye diffusion processing of an image-wise exposed color photographic material containing associated with at least one sensitive silver halide emulsion layer, a non-diffusible dye color providing compound while in contact with an image receptor layer, the method comprising the step of releasing from said non-diffusible dye color providing compound under alkaline development conditions an image dye comprising the azo dye corresponding to the following general formula ##STR15## wherein E represents an electron acceptor radical selected from the group consisting of cyano, and carboxy, or carbamoyl hydrolysis derivatives of cyano; and K represents the radical of an azo coupling component, which is derived from an open-chain or closed ring ketomethylene compound, a cyclic enamine compound or a phenolic compound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |