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Patent US4229522A successfully refreshed from Google Patents.
US4229522A
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Method for forming color images
Assignee: Fujifilm Holdings Corp
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Filing: 1979-04-13
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Granted: 1980-10-21
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Expires: 1999-04-13
Abstract
Abstract A method for forming color images comprising processing a photographic element containing imagewise distributed silver in the presence of a polymer containing at least 30 mol % vinyl pyridines, a dye and an oxidizing agent to thereby oxidation-bleach the dye. Color images having excellent light fastness, heat resistance and humidity resistance are obtained.
Inventors
- 👤 Shigeru Nakamura
- 👤 Isao Shimamura
- 👤 Taku Nakamura
- 👤 Shinji Sakaguchi
- 👤 Takushi Miyazako
- 👤 Masatoshi Sugiysma
- 👤 Akio Mitsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:49
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; Y; Y10; Y10S; Y10S430/00; Y10S430/144
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
71 words
A method for forming color images which comprises exposing a color photographic light-sensitive element containing a dye, a polymer containing at least 30 mol% of a vinylpyridine represented by the formula: ##STR11## wherein R is a hydrogen atom or an alkyl group and silver halide, forming developed silver imagewise by development processing and then processing with an aqueous solution containing peroxoic acids or salt thereof to thereby oxidatively bleach said dye.
Claim 2
Independent Claim
71 words
A method for forming color images which comprises exposing a color photographic light-sensitive element containing a dye, a polymer containing at least 30 mol% of a vinylpyridine represented by the formula: ##STR11## wherein R is a hydrogen atom or an alkyl group and silver halide, forming developed silver imagewise by development processing and then processing with an aqueous solution containing peroxoic acids or salt thereof to thereby oxidatively bleach said dye.
Claim 3
Dependent Claim
18 words
The method for forming color images of claim 1, wherein said polymer is present in said photographic element.
Claim 4
Dependent Claim
20 words
The method for forming color images of claim 1, wherein said polymer contains at least 50 mol% of the vinylpyridine.
Claim 5
Dependent Claim
20 words
The method for forming color images of claim 1, wherein said vinylpyridine is selected from 2-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine and 2-methyl-5-vinylpyridine.
Claim 6
Dependent Claim
32 words
The method of claim 1, wherein said oxidizing agent is present in a silver halide emulsion layer, in a layer adjacent a silver halide emulsion layer or in a separate processing solution.
Claim 7
Dependent Claim
40 words
The method of claim 5, wherein said oxidizing agent is present in the silver halide emulsion layer or a layer adjacent the silver halide emulsion layer and is present in an amount of about 0.01 to 0.2 mol/m 2 .
Claim 8
Dependent Claim
25 words
The method of claim 5, wherein said oxidizing agent is present in a separate processing solution in an amount of 1×10 -3 to 2 mols/l.
Claim 9
Dependent Claim
18 words
The method of claim 7, wherein said oxidizing agent solution has a pH of about 2 to 7.
Claim 10
Dependent Claim
26 words
The method of claim 1, wherein said polymer is present in said silver halide emulsion layer or in a layer adjacent said silver halide emulsion layer.
Claim 11
Dependent Claim
23 words
The method of claim 9, wherein said polymer is present in an amount of about 100 mg/m 2 to 10 g/m 2 .
Claim 12
Dependent Claim
30 words
The method of claim 1, wherein said dye is present in the silver halide emulsion layer, a layer adjacent said silver halide emulsion layer or in a separate processing solution.
Claim 13
Dependent Claim
31 words
The method of claim 11, wherein said dye is present in said silver halide emulsion layer or said adjacent layer in an amount of about 0.1 to 0.5 g/m 2 .
Claim 14
Dependent Claim
24 words
The method of claim 11, wherein said dye is present in a separate processing solution in an amount of 5 to about 50 g/l.
Claim 15
Dependent Claim
16 words
The method of claim 11, wherein said dye is an azo dye or an anthraquinone dye.
Claim 16
Dependent Claim
30 words
The method of claim 1, wherein said oxidizing agent has an oxidation-reduction potential higher than that of a silver(I)/silver(II) pair in the presence of polyvinylpyridine at the oxidative processing pH.
Claim 17
Dependent Claim
29 words
The method of claim 1, wherein said dye has an oxidation potential less than that of the silver(I)/silver(II) pair in the presence of polyvinylpyridine at the oxidative processing pH.
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |