US4524130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide color photographic light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1984-01-19
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Granted: 1985-06-18
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Expires: 2004-01-19
Abstract
Abstract A silver halide color photographic light-sensitive material is disclosed. The material is comprised of a support base having a plurality of silver halide emulsion layers positioned thereon. The material includes at least one silver halide emulsion layer having a particular sensitivity and color sensitivity, and a second silver halide emulsion layer having the same color sensitivity but having a greater sensitivity with respect to light, the second layer including a silver halide having a silver iodide content in the range of 9% by mol to 15% by mol. The material includes a DIR compound in a layer other than the second silver halide emulsion layer. The DIR compound releases a diffusible development inhibitor or precursor thereof by a coupling reaction. The resulting material has greatly improved granularity and sharpness.
Inventors
- 👤 Yasuo Iwasa
- 👤 Shingo Ishimaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:23
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C1/00; G03C1/005; G03C1/035; G03C2001/03558; G03C2007/3034; G03C7/305; G03C7/30541; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
A silver halide color photographic light-sensitive material, comprising: a support base having thereon: a first, color-sensitive, silver halide emulsion layer having a sensitivity with respect to light; a second, color-sensitive, silver halide emulsion layer having a sensitivity with respect to light which is greater than the sensitivity with respect to light of the first sensitive layer, the second layer having the same color sensitivity properties as the first layer, the silver halide of the second layer having a silver iodide content in the range of 9% by mol to 15% by mol; and a DIR compound which releases a compound selected from the group consisting of diffusible development inhibitors having a degree of diffusion of 0.4 or more as a releasing group and precursors thereof by a coupling reaction, the DIR compound being present in a color-sensitive, silver halide emulsion layer other than the second layer, which also has the same color sensitivity properties as the first layer.
Claim 2
Dependent Claim
158 words
A silver halide color photographic light-sensitive material, comprising: a support base having thereon: a first, color-sensitive, silver halide emulsion layer having a sensitivity with respect to light; a second, color-sensitive, silver halide emulsion layer having a sensitivity with respect to light which is greater than the sensitivity with respect to light of the first sensitive layer, the second layer having the same color sensitivity properties as the first layer, the silver halide of the second layer having a silver iodide content in the range of 9% by mol to 15% by mol; and a DIR compound which releases a compound selected from the group consisting of diffusible development inhibitors having a degree of diffusion of 0.4 or more as a releasing group and precursors thereof by a coupling reaction, the DIR compound being present in a color-sensitive, silver halide emulsion layer other than the second layer, which also has the same color sensitivity properties as the first layer.
Claim 3
Dependent Claim
19 words
A material as claimed in claim 1, wherein the first layer and the second layer are both blue-sensitive layers.
Claim 4
Dependent Claim
19 words
A material as claimed in claim 1, wherein both the first layer and the second layer are green-sensitive layers.
Claim 5
Dependent Claim
19 words
A material as claimed in claim 1, wherein both the first layer and the second layer are red-sensitive layers.
Claim 6
Dependent Claim
41 words
A material as claimed in claim 1, wherein the DIR compound is present in a layer containing silver halide having a silver iodide content of 5% by mol or less, which has the same coupler sensitivity properties as the first layer.
Claim 7
Dependent Claim
31 words
A material as claimed in claim 5, wherein the layer containing the DIR compound contains a silver halide having an iodide content in the range of 2% to 4% by mol.
Claim 8
Dependent Claim
29 words
A material as claimed in claim 6, wherein the second layer contains a silver halide having a silver iodide content in the range of 10% to 14% by mol.
Claim 9
Dependent Claim
29 words
A material as claimed in claim 1, wherein the DIR compound is present in an amount in the range of 0.0001 to 0.1 mol per mol of silver halide.
Claim 10
Dependent Claim
29 words
A material as claimed in claim 8, wherein the DIR compound is present in an amount in the range of 0.001 to 0.05 mol per mol of silver halide.
Claim 11
Dependent Claim
89 words
A material as claimed in claim 9, wherein the DIR compound is represented by the general formula (I): A(Y).sub.m (I) wherein A is a coupler component, m is 1 or 2, and Y is a group which is attached to a coupling position of the coupler component A and is released by a reaction with an oxidation product of a color developing agent, which is a development inhibitor having a degree of diffusion of 0.4 or more as releasing group or a compound capable of releasing a development inhibitor.
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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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |