US3869291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide light-sensitive color photographic material containing color coupler masking compound and development inhibitor releasing compound
Assignee: Agfa Gevaert AG
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Filing: 1973-11-29
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Granted: 1975-03-04
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Expires: 1993-11-29
Abstract
Abstract A colorphotographic material contains, for obtaining improved color reproduction, balanced gradation, improved sharpness and refined color grain, a combination of a colorless color forming coupler (I), a mask former (II) and a DIR-compound (III) that does not contribute towards formation of the image dye. Also the mask former may be one that does not contribute towards formation of the image dye.
Inventors
- 👤 Helmut Mader
- 👤 Rigobert Otto
- 👤 Paul Marx
- 👤 Walter Puschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:05
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3225; G03C7/3003; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
IN A LIGHT-SENSITIVE COLOR-PHOTOGRAPHIC MATERIAL COMPRISING AT LEAST ONE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER, WHICH LAYER CONTAINS THE FOLLOWING COMPOUNDS: A. A COLORLESS NON-DIFUSSING COLOR COUPLER 1 WHICH GIVES A NON-DIFFUASION IMAGE DYE ON REACTION WITH COLOR DEVELOPER OXIDATION PRODUCTS; B. A NON-DIFFUSION MASK FORMER II WHICH FORMS, DURING PHOTOGRAPHIC THE SIDE DENSITY OF THE IMAGE DYE; SAID MASK FORMER BEING SELECTED FROM THE GROUP CONSISTING OF AN OSAZONE, AN AMIDRAZONE, AND A COLORED MASKING COUPLER C. A COLORLESS NON-DIFFUSION NON-PERFORMED DIR-COMPOUND III WHICH IS A THIOETHER AND WHICH SPLITS OFF A DIFFUSING DEVELOPMENT-INHIBITING SUBSTANCE DURING REACTION WITH COLOR DEVELOPER OXIDATION PRODUCTS; THE IMPROVEMENT ACCORDING TO WHICH THE NON-PERFORMED DIRCOMPOUND III DOES NOT CONTRIBUTE TOWARDS FORMATION OF THE IMAGE DYE DURING PHOTOGRAPHIC PROCESSING AND HAS THE FORMULA
Claim 2
Dependent Claim
127 words
IN A LIGHT-SENSITIVE COLOR-PHOTOGRAPHIC MATERIAL COMPRISING AT LEAST ONE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER, WHICH LAYER CONTAINS THE FOLLOWING COMPOUNDS: A. A COLORLESS NON-DIFUSSING COLOR COUPLER 1 WHICH GIVES A NON-DIFFUASION IMAGE DYE ON REACTION WITH COLOR DEVELOPER OXIDATION PRODUCTS; B. A NON-DIFFUSION MASK FORMER II WHICH FORMS, DURING PHOTOGRAPHIC THE SIDE DENSITY OF THE IMAGE DYE; SAID MASK FORMER BEING SELECTED FROM THE GROUP CONSISTING OF AN OSAZONE, AN AMIDRAZONE, AND A COLORED MASKING COUPLER C. A COLORLESS NON-DIFFUSION NON-PERFORMED DIR-COMPOUND III WHICH IS A THIOETHER AND WHICH SPLITS OFF A DIFFUSING DEVELOPMENT-INHIBITING SUBSTANCE DURING REACTION WITH COLOR DEVELOPER OXIDATION PRODUCTS; THE IMPROVEMENT ACCORDING TO WHICH THE NON-PERFORMED DIRCOMPOUND III DOES NOT CONTRIBUTE TOWARDS FORMATION OF THE IMAGE DYE DURING PHOTOGRAPHIC PROCESSING AND HAS THE FORMULA
Claim 3
Dependent Claim
28 words
A material as claimed in claim 1 wherein the colored masking coupler is a 5-pyrazolone coupler or a naphthol coupler and has an azo group in coupling position.
Claim 4
Dependent Claim
75 words
A light sensitive color-photographic material comprising at leaast one light-sensitive silver halide emulsion layer containing a colorless non-diffusing color coupler capable of reaction with the oxidation product of color developer to form an image dye, and two different compounds capable of reacting with oxidation products of a color developer to improve the color reproductions and color balance in the photographic material, one of said compounds being a mask former of one of the following formulae
Claim 5
Dependent Claim
75 words
A light sensitive color-photographic material comprising at leaast one light-sensitive silver halide emulsion layer containing a colorless non-diffusing color coupler capable of reaction with the oxidation product of color developer to form an image dye, and two different compounds capable of reacting with oxidation products of a color developer to improve the color reproductions and color balance in the photographic material, one of said compounds being a mask former of one of the following formulae
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |