US4500634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide color photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1983-08-24
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Granted: 1985-02-19
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Expires: 2003-08-24
Abstract
Abstract A silver halide color photographic material in which both a coupler capable of releasing a diffusible development restrainer by coupling and a polymer coupler latex are present to increase visual sharpness.
Inventors
- 👤 Kei Sakanoue
- 👤 Morio Yagihara
- 👤 Seigi Ichijima
- 👤 Kimitoshi Nagao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:11
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3225; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A silver halide color photographic material which contains both a coupler capable of releasing a diffusible development restrainer upon coupling and a polymer coupler latex, said silver halide color photographic material having improved visual sharpness in a high spatial frequency region and in a low spatial frequency region due to the combined use of said coupler capable of releasing a diffusible development restrainer upon coupling and said polymer coupler latex.
Claim 2
Dependent Claim
70 words
A silver halide color photographic material which contains both a coupler capable of releasing a diffusible development restrainer upon coupling and a polymer coupler latex, said silver halide color photographic material having improved visual sharpness in a high spatial frequency region and in a low spatial frequency region due to the combined use of said coupler capable of releasing a diffusible development restrainer upon coupling and said polymer coupler latex.
Claim 3
Dependent Claim
39 words
The silver halide color photographic material of claim 1, wherein said coupler capable of releasing a diffusible development restrainer upon coupling and said polymer coupler latex are contained in the same layer of the silver halide color photographic material.
Claim 4
Dependent Claim
27 words
The silver halide color photographic material of claim 1, wherein said coupler capable of releasing a diffusible development restrainer has a diffusibility of about 0.4 or more.
Claim 5
Dependent Claim
28 words
The silver halide color photographic material of claim 1, wherein said coupler capable of releasing a diffusible development restrainer has a diffusibility of not higher than about 1.0.
Claim 6
Dependent Claim
30 words
The silver halid color photographic material of claim 1, wherein said low spectral frequency region is 2 to 5 cycle/mm and said high spectral frequency region is above 20 cycle/mm.
Claim 7
Dependent Claim
23 words
The silver halide color photographic material of claim 5, wherein MTF values in the low spectral frequency region are raised to over 1.15.
Claim 8
Dependent Claim
18 words
The silver halide color photographic material of claim 6, wherein said MTF values are raised to over 1.5.
Claim 9
Dependent Claim
28 words
The silver halide color photographic material of claim 7, wherein said coupler capable of releasing a diffusible development restrainer has a diffusibility of about 0.4 to about 1.0.
Claim 10
Dependent Claim
53 words
The silver halide color photographic material of claim 8, wherein said polymer coupler latex is added in the range of 0.005 to 0.5 mol per mol of silver based on the corresponding monomeric coupler and the diffusible development restrainer is added in an amount of 0.0001 to 0.5 mol per mol of silver.
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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |