Patent US4582780A successfully refreshed from Google Patents.
US4582780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer color photographic light sensitive material
Assignee: Tulalip Consultoria Comercial SU
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Filing: 1984-09-24
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Granted: 1986-04-15
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Expires: 2004-09-24
Abstract
Abstract Adjacency effects of a color photographic material may be increased by dividing a light-sensitive silver halide emulsion layer into three emulsion layers sensitive to the same spectral region of the visible light, the uppermost silver halide emulsion layer of which has the highest sensitivity and the lowermost silver halide emulsion layer has the lowest sensitivity, wherein the maximum color density of the uppermost silver halide emulsion layer, after color development, is lower than 0.60 and the maximum color density of both the intermediate and lowermost silver halide emulsion layers, after color development, are each higher than 0.60.
Inventors
- 👤 Giovanni Giusto
- 👤 Elio de Saraca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C2007/3034
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
Multilayer color photographic light-sensitive material having on a support base blue-, green- and red-sensitized silver halide emulsion layers associated with non-diffusing color couplers, wherein at least one of the silver halide emulsion layers comprises three silver halide emulsion layers sensitized to the same spectral region of visible light, the uppermost silver halide emulsion layer of which has the highest sensitivity and the lowermost silver halide emulsion layer has the lowest sensitivity, characterized in that the maximum color density of the uppermost silver halide emulsion layer, after development, is lower than 0.60 and the maximum color densities of both the intermediate and the lowermost silver halide emulsion layers, after color development, are each higher than 0.60.
Claim 2
Dependent Claim
115 words
Multilayer color photographic light-sensitive material having on a support base blue-, green- and red-sensitized silver halide emulsion layers associated with non-diffusing color couplers, wherein at least one of the silver halide emulsion layers comprises three silver halide emulsion layers sensitized to the same spectral region of visible light, the uppermost silver halide emulsion layer of which has the highest sensitivity and the lowermost silver halide emulsion layer has the lowest sensitivity, characterized in that the maximum color density of the uppermost silver halide emulsion layer, after development, is lower than 0.60 and the maximum color densities of both the intermediate and the lowermost silver halide emulsion layers, after color development, are each higher than 0.60.
Claim 3
Dependent Claim
33 words
Multilayer color photographic material according to claim 1, wherein the sum of the maximum color densities of the uppermost silver halide emulsion layer and intermediate silver halide emulsion layer is higher than 1.0.
Claim 4
Dependent Claim
45 words
Multilayer color photographic material according to claim 1, wherein the sum of the maximum color densities of the uppermost silver halide emulsion layer and intermediate silver halide emulsion layer is equal or higher than the maximum color density of the lowermost silver halide emulsion layer.
Claim 5
Dependent Claim
61 words
Multilayer color photographic material according to claim 1, wherein the red-sensitized silver halide emulsion layer in the indicated order comprises a fine-grain low-sensitivity silver halide emulsion layer, a mean-grain medium-sensitivity silver halide emulsion layer and a coarse-grain high-sensitivity silver halide emulsion layer, said fine-grain low-sensitivity silver halide emulsion layer being the closest one to the supporting base in said red-sensitized layer.
Claim 6
Dependent Claim
89 words
Multilayer color photographic material according to claim 1 which consists of a supporting base having coated thereon in the indicated order: an antihalation layer, three layers of silver halide emulsion sensitized to the red light but of different sensitivity and containing cyan-dye forming couplers, two layers of silver halide emulsion sensitized to the green light but of different sensitivity and containing magenta-dye forming couplers, a yellow dye filter layer, two layers of silver halide emulsion sensitized to the blue light but of different sensitivity and containing yellow-dye forming couplers.
Claim 7
Dependent Claim
18 words
Multilayer color photographic material according to claim 1 wherein the silver halide emulsions utilize gelatin as dispersing medium.
Claim 8
Dependent Claim
14 words
Multilayer color photographic material according to claim 1 comprising non-diffusing color couplers dispersed therein.
Claim 9
Dependent Claim
43 words
Multilayer color photographic material according to claim 1 wherein the concentration of the color coupler in the intermediate medium-sensitivity silver halide emulsion layer is 2 to 10 times the concentration of the color coupler in the uppermost highly sensitive silver halide emulsion layer.
Claim 10
Dependent Claim
30 words
A process for the production of color images which comprises exposing the material of claim 1 to a colored object and developing the exposed material in a color forming developer.
Claim 11
Dependent Claim
10 words
Colored images produced by the process claimed in claim 9.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |