Patent US4435500A successfully refreshed from Google Patents.
US4435500A
Expired / Lapsed
US
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Method for developing silver halide photographic light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1982-08-31
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Granted: 1984-03-06
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Expires: 2002-08-31
Abstract
Abstract A method of rapidly processing a silver halide photographic light-sensitive material having high sensitivity and high covering power using a developing solution is disclosed. The developing solution contains a combination of a silver halide solvent and a particular anti-foggant. The rapid processing is not attended by increase in fog and deterioration of graininess. The photographic material contains a surface latent image type silver halide emulsion and a silver halide emulsion having fogged nuclei inside the grains in a single layer formed by coating the mixture thereof, or in a double layer formed by coating them separately. The anti-foggant has the general formula (I) or (II): ##STR1## wherein R 1 represents hydrogen, a nitro group, a cyano group or a halogen atom; and R 2 represents hydrogen, a halogen atom or an alkyl group.
Inventors
- 👤 Eiichi Okutsu
- 👤 Nobuyuki Iwasaki
- 👤 Shunji Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A method for processing a silver halide photographic light-sensitive material, comprising the steps of: (a) providing a silver halide photographic light-sensitive material comprising a support having thereon a surface latent image type silver halide emulsion and a silver halide emulsion containing fogged nuclei inside the grains; (b) exposing the photographic material to light; and (c) developing the exposed photographic material in a developing solution comprising: (i) a silver halide solvent, wherein said silver halide solvent is an imidazole derivative represented by the formula: ##STR5## wherein Z 1 , Z 2 , Z 3 and Z 4 independently represent hydrogen, an alkyl group having 5 or less carbon atoms, a hydroxyalkyl group having 5 or less carbon atoms or an alkenyl group having 5 or less carbon atoms; and (ii) a compound represented by the following general formula (I) or (II): ##STR6## wherein R 1 is hydrogen, a nitro group, a cyano group or a halogen atom; and R 2 is hydrogen, a halogen atom or an alkyl group.
Claim 2
Independent Claim
168 words
A method for processing a silver halide photographic light-sensitive material, comprising the steps of: (a) providing a silver halide photographic light-sensitive material comprising a support having thereon a surface latent image type silver halide emulsion and a silver halide emulsion containing fogged nuclei inside the grains; (b) exposing the photographic material to light; and (c) developing the exposed photographic material in a developing solution comprising: (i) a silver halide solvent, wherein said silver halide solvent is an imidazole derivative represented by the formula: ##STR5## wherein Z 1 , Z 2 , Z 3 and Z 4 independently represent hydrogen, an alkyl group having 5 or less carbon atoms, a hydroxyalkyl group having 5 or less carbon atoms or an alkenyl group having 5 or less carbon atoms; and (ii) a compound represented by the following general formula (I) or (II): ##STR6## wherein R 1 is hydrogen, a nitro group, a cyano group or a halogen atom; and R 2 is hydrogen, a halogen atom or an alkyl group.
Claim 3
Dependent Claim
46 words
A method for processing a silver halide photographic light-sensitive material as claimed in claim 1, wherein the compound represented by the general formula (I) or (II) is present in the developing solution in a concentration of 0.02 g to 5.0 g per liter of developing solution.
Claim 4
Independent Claim
47 words
A method for processing a silver halide photographic light-sensitive material as claimed in any of claims 1 or 2, wherein the surface latent image type silver halide emulsion and silver halide emulsion containing fogged nuclei inside the grains are mixed together and contained within a single layer.
Claim 5
Independent Claim
46 words
A method for processing a silver halide photographic light-sensitive material as claimed in any of claims 1 or 2, wherein the surface latent image type silver halide emulsion and silver halide emulsion containing fogged nuclei inside the grains are contained within separate layer on the support.
Claim 6
Dependent Claim
33 words
A method for processing a silver halide photographic light-sensitive material as claimed in claim 1, wherein the developing agent is selected from the group consisting of 1-phenyl-3-pyrazolidone and its derivatives, N-methyl-p-aminophenol, and hydroquinone.
Claim 7
Dependent Claim
40 words
A method for processing a silver halide photographic light-sensitive material as claimed in claim 1, wherein the silver halide solvent is present in the developing solution in a concentration of 0.01 g to 10 g per liter of developing solution.
Claim 8
Dependent Claim
40 words
A method for processing a silver halide photographic light-sensitive material as claimed in claim 1, wherein the developing is carried out over a period from 10 seconds to 2 minutes at a temperature of from 20° C. to 45° C.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |