Patent US4156608A successfully refreshed from Google Patents.
US4156608A
Expired / Lapsed
US
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Color photographic material with improved color reproduction
Assignee: Agfa Gevaert AG
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Filing: 1977-05-02
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Granted: 1979-05-29
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Expires: 1997-05-02
Abstract
Abstract Suitable masking compounds for masking the undesired color side densities of image dyes produced from color couplers are those of the following formula ##STR1## in which R 1 represents hydrogen or one or more substituents such as halogen, alkyl, aryl, a heterocyclic group alkoxy, hydroxyl, amino, acylamino, sulfo, sulfonyl, carboxyl or carbamyl or condensed carbocyclic or heterocyclic ring. R 2 represents alkyl, aryl, a heterocyclic group carboxyl or esters or amide derived from carboxyl X represents a dye group optionally containing a solubilizing group. On development with black-and-white or color-forming developers the dye group is released imagewise and is removed by aqueous processing baths leaving back a positive color or masking image.
Inventors
- 👤 Hans Vetter
- 👤 Walter Puschel
- 👤 Rigobert Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:36
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30; C09B29/0003; C09B29/0007; G; G03; G03C; G03C7/00; G03C7/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
155 words
A colour photographic multilayer material with at least one red-sensitive silver halide emulsion layer, with which non-diffusible colour coupler is associated for producing the blue-green component colour image, a green-sensitive silver halide emulsion layer, with which a non-diffusible colour coupler is associated for producing the purple component colour image, and a blue-sensitive silver halide emulsion layer with which a non-diffusible colour coupler is associated for producing the yellow colour component image, wherein a non-diffusible coloured compound of the following formula is associated with at least one of the above-mentioned red-sensitive and green-sensitive silver halide emulsion layers: ##STR43## in which R 1 represents one or more substituents selected from hydrogen halogen, alkyl, aryl, alkoxy, hydroxyl, amino, acylamino, sulpho, sulfamoyl carboxyl or carbamoyl; R 2 represents alkyl, aryl groups, or a non-coupling alkoxy carbonyl group or a non-coupling carbamoyl group; and X represents a dye radical or a radical of a dye precursor carrying a solubilizing group
Claim 2
Dependent Claim
155 words
A colour photographic multilayer material with at least one red-sensitive silver halide emulsion layer, with which non-diffusible colour coupler is associated for producing the blue-green component colour image, a green-sensitive silver halide emulsion layer, with which a non-diffusible colour coupler is associated for producing the purple component colour image, and a blue-sensitive silver halide emulsion layer with which a non-diffusible colour coupler is associated for producing the yellow colour component image, wherein a non-diffusible coloured compound of the following formula is associated with at least one of the above-mentioned red-sensitive and green-sensitive silver halide emulsion layers: ##STR43## in which R 1 represents one or more substituents selected from hydrogen halogen, alkyl, aryl, alkoxy, hydroxyl, amino, acylamino, sulpho, sulfamoyl carboxyl or carbamoyl; R 2 represents alkyl, aryl groups, or a non-coupling alkoxy carbonyl group or a non-coupling carbamoyl group; and X represents a dye radical or a radical of a dye precursor carrying a solubilizing group
Claim 3
Dependent Claim
72 words
A colour photographic multilayer material as claimed in claim 1, wherein the dye radical represented by X is attached to the SO 2 -group either directly or through an intermediate member Z, Z representing alkylene with 1 to 6 carbon atoms, arylene or a heterocyclic group which are attached to X either directly or by way of --O--, --S--, --SO 2 --, --NR-- (R=hydrogen or alkyl), --CO--, --CONH-- or --SO 2 NH--.
Claim 4
Dependent Claim
33 words
A colour photographic multilayer material as claimed in claim 2, wherein X represents a radical of the following formula: ##STR44## in which m and n independently of one another represents 0 or 1.
Claim 5
Dependent Claim
22 words
A colour photographic multilayer material as claimed in claim 3, wherein it contains a coloured compound corresponding to the following formula: ##STR45##
Claim 6
Dependent Claim
25 words
A colour photographic multilayer material as claimed in claim 2, wherein X represents a radical of the following formula: ##STR46## in which n=0 or 1.
Claim 7
Dependent Claim
184 words
A process for the production of colour-corrected colour photographic images, in which a colour photographic multilayer material with at least one red-sensitive silver halide emulsion layer, with which a non-diffusible colour coupler is associated for producing the cyan component colour image, a green-sensitive silver halide emulsion layer, which a non-diffusible colour coupler is associated for producing the magenta component colour image, and a blue-sensitive silver halide emulsion layer which a non-diffusible colour coupler is associated for producing the yellow component colour image, is exposed image-wise and developed with a colour developer compound containing a primary aromatic amino group, wherein a non-diffusible coloured compound corresponding to the following general formula is associated with at least one of the above-mentioned red-sensitive and green-sensitive silver halide emulsion layers: ##STR47## in which: R 1 represents one or more substituents selected from hydrogen, halogen, alkyl, aryl, alkoxy, hydroxyl, amino, acylamino, sulpho, sulfamoyl, carboxyl or carbamoly; R 2 represnts alkyl, aryl groups, or a non-coupling alkoxy carbonyl group or a non-coupling carbamoyl group; and X represents a dye radical or a radical of a dye precursor carrying a solubilizing group.
Claim 8
Dependent Claim
184 words
A process for the production of colour-corrected colour photographic images, in which a colour photographic multilayer material with at least one red-sensitive silver halide emulsion layer, with which a non-diffusible colour coupler is associated for producing the cyan component colour image, a green-sensitive silver halide emulsion layer, which a non-diffusible colour coupler is associated for producing the magenta component colour image, and a blue-sensitive silver halide emulsion layer which a non-diffusible colour coupler is associated for producing the yellow component colour image, is exposed image-wise and developed with a colour developer compound containing a primary aromatic amino group, wherein a non-diffusible coloured compound corresponding to the following general formula is associated with at least one of the above-mentioned red-sensitive and green-sensitive silver halide emulsion layers: ##STR47## in which: R 1 represents one or more substituents selected from hydrogen, halogen, alkyl, aryl, alkoxy, hydroxyl, amino, acylamino, sulpho, sulfamoyl, carboxyl or carbamoly; R 2 represnts alkyl, aryl groups, or a non-coupling alkoxy carbonyl group or a non-coupling carbamoyl group; and X represents a dye radical or a radical of a dye precursor carrying a solubilizing group.
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) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |