Patent US3994729A successfully refreshed from Google Patents.
US3994729A
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Method for processing photographic light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1975-06-23
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Granted: 1976-11-30
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Expires: 1995-06-23
Abstract
Abstract A method for processing a photographic light-sensitive material, which comprises developing an exposed silver halide photographic material in a developer containing a developing agent and a dialdehyde compound, and fixing the material in a fixing solution containing (1) a thiosulfate, (2) a water-soluble aluminum salt and (3) at least 0.005 mol/liter of tartaric acid, or a salt thereof, citric acid or a salt thereof, or a mixture thereof.
Inventors
- 👤 Haruo Shibaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:20
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/386; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A method for processing a photographic light-sensitive material, which comprises developing an imagewise exposed silver halide photographic material in a developer containing a developing agent and dialdehyde compound hardening agent selected from the group consisting of glutaraldehyde, α-methylglutaraldehyde, β-methylglutaraldehyde, maleic dialdehyde, succinic dialdehyde, methoxysuccinic dialdehyde, methylsuccinic dialdehyde, α-methoxy-β-ethoxyglutaraldehyde, β-n-butoxyglutaraldehyde, α-ethyl-β-ethoxyglutaraldehyde, α, α-dimethoxysuccinic dialdehyde, β-isopropylsuccinic dialdehyde, α,α-diethylsuccinic dialdehyde, butylmaleic dialdehyde, the bisulfite adducts thereof and mixtures thereof, and fixing said material in a fixing solution containing (1) a thiosulfate, (2) a water-soluble aluminum salt and (3) 0.005 mol/liter to 0.04 mol/liter of tartaric acid, or a salt thereof, citric acid or a salt thereof, or a mixture thereof.
Claim 2
Independent Claim
107 words
A method for processing a photographic light-sensitive material, which comprises developing an imagewise exposed silver halide photographic material in a developer containing a developing agent and dialdehyde compound hardening agent selected from the group consisting of glutaraldehyde, α-methylglutaraldehyde, β-methylglutaraldehyde, maleic dialdehyde, succinic dialdehyde, methoxysuccinic dialdehyde, methylsuccinic dialdehyde, α-methoxy-β-ethoxyglutaraldehyde, β-n-butoxyglutaraldehyde, α-ethyl-β-ethoxyglutaraldehyde, α, α-dimethoxysuccinic dialdehyde, β-isopropylsuccinic dialdehyde, α,α-diethylsuccinic dialdehyde, butylmaleic dialdehyde, the bisulfite adducts thereof and mixtures thereof, and fixing said material in a fixing solution containing (1) a thiosulfate, (2) a water-soluble aluminum salt and (3) 0.005 mol/liter to 0.04 mol/liter of tartaric acid, or a salt thereof, citric acid or a salt thereof, or a mixture thereof.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein said water-soluble aluminum salt is aluminum chloride, aluminum sulfate, potassium alum, or a mixture thereof.
Claim 4
Dependent Claim
82 words
The method of claim 1, wherein said tartaric acid or a salt thereof is tartaric acid, potassium tartrate, sodium tartrate, potassium hydrogen tartrate, sodium hydrogen tartrate, sodium potassium tartrate, ammonium tartrate, ammonium potassium tartrate, antimony potassium tartrate, antimony sodium tartrate, lithium hydrogen tartrate, lithium tartrate, magnesium hydrogen tartrate, potassium boron tartrate, potassium lithium tartrate or a mixture thereof, and wherein said citric acid or a salt thereof is citric acid, sodium citrate, potassium citrate, lithium citrate, ammonium citrate, or a mixture thereof.
Claim 5
Dependent Claim
25 words
The method of claim 1, wherein said developing agent is a dihydroxybenzene, a 3-pyrazolidone, an aminophenol, pyrogallol, ascorbic acid, a 1-aryl-3-aminopyrazoline or a mixture thereof.
Claim 6
Dependent Claim
99 words
The method of claim 1, wherein said developer contains at least one of a preservative, a buffer, an alkali agent, a dissolving aid, a pH-adjusting agent, a sensitizing agent, a development accelerator, a surface active agent, a silver colloid dispersing agent, an anti-fogging agent, and a chelating agent, and wherein said developer has a pH ranging from about 9.5 to about 10.5 and wherein said fixing solution contains at least one of a preservative, a pH buffer, a pH-adjusting agent, and a chelating agent, and wherein said fixing solution has a pH ranging from about 3.8 to about 5.0.
Claim 7
Dependent Claim
54 words
The method of claim 1, wherein said dialdehyde compound is present in said developer in an amount of from about 1 to 50 g per liter of said developer and wherein said thiosulfate is present in said fixing solution in an amount of from about 0.1 to about 5 mol/liter of said fixing solution.
Claim 8
Dependent Claim
44 words
The method of claim 1, wherein said tartaric acid or a salt thereof, said citric acid or a salt thereof, or said mixture thereof, is present in said fixing solution in an amount of about 0.007 mol/liter to 0.038 mol/liter of said fixing solution.
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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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |