Patent US4239177A successfully refreshed from Google Patents.
Patent US4500632A successfully refreshed from Google Patents.
US4500632A
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US
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Process for stabilizing silver images
Assignee: Fujifilm Holdings Corp
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Filing: 1984-03-05
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Granted: 1985-02-19
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Expires: 2004-03-05
Abstract
Abstract A process for stabilizing a silver image is disclosed. The process is utilized in connection with a photographic material which is comprised of a water impermeable support having one or more light-sensitive silver halide emulsion layers thereon. After the photographic material is exposed and developed it is subjected to further processing by conventional means. However, within the further processing an aqueous solution is utilized which includes any compounds represented by the general formula (I), (II) or (III) as defined within the specification. The compound(s) represented by the general formula is/are generally present within the processing solution in a total amount of about 0.1 to 10 g/l of processing solution. By utilizing the aqueous solution containing the compound represented by the general formula within the processing, it is possible to greatly increase the stability of the silver image formed.
Inventors
- 👤 Kunioki Ohmura
- 👤 Masaaki Torigoe
- 👤 Isamu Itoh
- 👤 Katsumi Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:11
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/39; G03C5/268
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
196 words
A process for stabilizing a black-and white silver image comprising the steps of: providing a photographic material comprised of a water impermeable support having a light-sensitive silver halide emulsion layer thereon; exposing the material; subjecting the exposed material to development processing to obtain a developed image; and processing the developed image with an aqueous solution containing a compound represented by the following general formula (I) or (II): ##STR8## wherein: A is --OH, --SO 3 .sup.⊖ or ##STR9## R 1 is H, an alkyl group having 1 to 5 carbon atoms, a substituted alkyl group or a phenyl group, R 2 is an alkyl group having 1 to 5 carbon atoms or a substituted alkyl group, X.sup.⊖ is a halogen atom or a p-toluenesulfonate, and n is an integer of 2 to 5, however, general formula (I) includes an HX salt when A is ##STR10## (wherein X are the same as X.sup.⊖ described above); ##STR11## or an HX salt thereof wherein: R 3 is H, an alkyl group having 1 to 5 carbon atoms, a substituted alkyl group or a phenyl group, and n, R 2 and X are the same as in the general formula (I).
Claim 2
Dependent Claim
196 words
A process for stabilizing a black-and white silver image comprising the steps of: providing a photographic material comprised of a water impermeable support having a light-sensitive silver halide emulsion layer thereon; exposing the material; subjecting the exposed material to development processing to obtain a developed image; and processing the developed image with an aqueous solution containing a compound represented by the following general formula (I) or (II): ##STR8## wherein: A is --OH, --SO 3 .sup.⊖ or ##STR9## R 1 is H, an alkyl group having 1 to 5 carbon atoms, a substituted alkyl group or a phenyl group, R 2 is an alkyl group having 1 to 5 carbon atoms or a substituted alkyl group, X.sup.⊖ is a halogen atom or a p-toluenesulfonate, and n is an integer of 2 to 5, however, general formula (I) includes an HX salt when A is ##STR10## (wherein X are the same as X.sup.⊖ described above); ##STR11## or an HX salt thereof wherein: R 3 is H, an alkyl group having 1 to 5 carbon atoms, a substituted alkyl group or a phenyl group, and n, R 2 and X are the same as in the general formula (I).
Claim 3
Dependent Claim
35 words
A process for stabilizing a silver image as claimed in claim 1, wherein the processing of the developed image includes a rinsing bath which contains the compound represented by the general formula (I) or (II).
Claim 4
Dependent Claim
39 words
A process for stabilizing silver image as claimed in any of claims 1 or 2, wherein the compound represented by the general formula (I) or (II) is present in an amount of 0.1 to 10 g/l of processing solution.
Claim 5
Dependent Claim
36 words
A process for stabilizing a silver image as claimed in claim 3, wherein the compound represented by the general formula (I) or (II) is present in an amount of 0.5 to 5 g/l of processing solution.
Claim 6
Dependent Claim
33 words
A process for stabilizing a silver image as claimed in any of claims 1 or 2, wherein the water impermeable support is a paper support having both sides laminated with a hydrophobic polymer.
Claim 7
Dependent Claim
36 words
A process for stabilizing a silver image as claimed in any of claims 1 or 2, wherein the processing of the developed images is carried out at a temperature of between 18° C. to 50° C.
References Cited (Backward Citations)
US3220839A
Cited
US3627531A
Cited
US3617283A
Cited
US3565621A
Cited
US4230792A
Cited
GB2019024A
Cited
US4322493A
Cited
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 |