US4371610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for development-processing silver halide light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1981-07-24
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Granted: 1983-02-01
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Expires: 2001-07-24
Abstract
Abstract A process for development-processing a silver halide black-and-white photographic light-sensitive material without silver stain and fog by the use of a developing solution which contains 0.1 mole/l or more of sulfite and at least one compound represented by the following general formula (I) or (II) ##STR1## wherein M represents a hydrogen atom, an alkali metal atom or an ammonium group; R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; n represents an integer of 1 to 8; and X represents a sulfonic acid group, a sulfonate group, a carboxylic acid group or a carboxylate group.
Inventors
- 👤 Takashi Toyoda
- 👤 Isamu Itoh
- 👤 Minoru Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A method for processing a silver halide black and white light-sensitive material comprising treating said material imagewise exposed with a developing solution which contains 0.1 mole/1 or more of sulfite and at least one compound represented by the following general formula (I) ##STR4## wherein M represents a hydrogen atom, an alkali metal atom or an ammonium group; R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; n represents an integer of 1 to 8; and X represents a sulfonic acid group, a sulfonate group, a carboxylic acid group or a carboxylate group.
Claim 2
Independent Claim
98 words
A method for processing a silver halide black and white light-sensitive material comprising treating said material imagewise exposed with a developing solution which contains 0.1 mole/1 or more of sulfite and at least one compound represented by the following general formula (I) ##STR4## wherein M represents a hydrogen atom, an alkali metal atom or an ammonium group; R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; n represents an integer of 1 to 8; and X represents a sulfonic acid group, a sulfonate group, a carboxylic acid group or a carboxylate group.
Claim 3
Dependent Claim
15 words
The method as described in claim 1, wherein said developing solution contains an aldehyde hardener.
Claim 4
Dependent Claim
40 words
The method as described in claim 2, wherein said aldehyde hardener is a compound containing at least one aldehyde group selected from the group consisting of formaldehyde, dimethylol urea, glyoxal, and glutaraldehyde, a sulfite thereof or a hydrogensulfite adduct thereof.
Claim 5
Dependent Claim
23 words
The method as described in claim 1, wherein X in said general formula (I) is a sulfonic acid group or a sulfonate group.
Claim 6
Dependent Claim
23 words
The method as described in claim 1, wherein X in said general formula (I) is a carboxylic acid group or a carboxylate group.
Claim 7
Dependent Claim
18 words
The method as described in claim 1, wherein n in said general formula (I) is 2 or 4.
Claim 8
Dependent Claim
18 words
The method as described in claim 1, wherein said method comprises fixing said image-wise exposed and developed material.
Claim 9
Dependent Claim
24 words
The method as described in claim 1, wherein the developing solution contains an additional developing agent for developing a black and white light-sensitive material.
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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |