US4391900A
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: 1982-01-13
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Granted: 1983-07-05
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Expires: 2002-01-13
Abstract
Abstract A process for development-processing a silver halide photographic light-sensitive material is described, comprising processing with a developing solution containing 0.1 mol/liter or more of sulfite ion and at least one compound represented by formula (I) ##STR1## wherein n represents an integer of from 2 to 6; each of R 1 and R 2 represents hydrogen or an alkyl group having from 1 to 6 carbon atoms; and M represents hydrogen or an alkali metal atom. According to the process, the generation of silver sludge and the formation of fog are prevented when a black-and-white photographic light-sensitive material is processed with a developing solution containing sulfates in a high concentration.
Inventors
- 👤 Takashi Toyoda
- 👤 Tadao Shishido
- 👤 Teruaki Tsujikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:34
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
75 words
A process for development-processing an imagewise exposed silver halide photographic light-sensitive material comprising processing the material with a developing solution containing 0.1 mol/liter or more of sulfite ion and at least one compound represented by formula (I) ##STR6## wherein n represents an integer of from 2 to 6; each of R 1 and R 2 represents an alkyl group having from 1 to 6 carbon atoms; and M represents hydrogen or an alkali metal atom.
Claim 2
Dependent Claim
75 words
A process for development-processing an imagewise exposed silver halide photographic light-sensitive material comprising processing the material with a developing solution containing 0.1 mol/liter or more of sulfite ion and at least one compound represented by formula (I) ##STR6## wherein n represents an integer of from 2 to 6; each of R 1 and R 2 represents an alkyl group having from 1 to 6 carbon atoms; and M represents hydrogen or an alkali metal atom.
Claim 3
Dependent Claim
30 words
A process for development-processing as in claim 1, wherein the alkyl group represented by R 1 or R 2 is a methyl group, an ethyl group, or a propyl group.
Claim 4
Dependent Claim
20 words
A process for development-processing as in claim 1, wherein each of R 1 and R 2 represents an ethyl group.
Claim 5
Dependent Claim
33 words
A process for development-processing as in claim 1, 2, or 3, wherein the concentration of the compound represented by formula (I) is from 0.005 g to 5 g per liter of developing solution.
Claim 6
Dependent Claim
33 words
A process for development-processing as in claim 1, 2, or 3, wherein the concentration of the compound represented by formula (I) is from 0.01 g to 1.0 g per liter of developing solution.
Claim 7
Dependent Claim
27 words
A process for development-processing as in claim 4, wherein the concentration of the sulfite ion is from 0.2 mol to 1.0 mol per liter of developing solution.
Claim 8
Dependent Claim
16 words
A process for development-processing as in claim 1, wherein the developing solution contains an aldehyde hardener.
Claim 9
Dependent Claim
30 words
A process for development-processing as in claim 7, wherein the aldehyde hardener is a compound containing at least one aldehyde group, the sulfite adduct thereof or the hydrogensulfite adduct thereof.
Claim 10
Dependent Claim
18 words
A process for development-processing as in claim 7, wherein the aldehyde hardener is formaldehyde, dimethylolurea, glyoxal, or glutaraldehyde.
Claim 11
Dependent Claim
27 words
A process for development-processing as in claim 7, wherein the concentration of the aldehyde hardener is from 1 g to 20 g per liter of developing solution.
Claim 12
Dependent Claim
19 words
A process for development-processing as in claim 1, wherein the development-processing is carried out using an automatic developing processor.
Claim 13
Dependent Claim
20 words
A process for development-processing as in claim 1, wherein the pH of the developing solution ranges from 8 to 12.
Claim 14
Dependent Claim
20 words
A process for development-processing as in claim 1, wherein the pH of the developing solution ranges from 9.0 to 10.5.
Claim 15
Dependent Claim
22 words
A process for development-processing as in claim 1, wherein the temperature of the developing solution ranges from 20° C. to 50° C.
Claim 16
Dependent Claim
22 words
A process for development-processing as in claim 1, wherein the temperature of the developing solution ranges from 30° C. to 60° C.
Claim 17
Dependent Claim
24 words
A process for development-processing as in claim 1, wherein the developing solution is an aqueous alkaline solution containing a developing agent for black-and-white photography.
Claim 18
Dependent Claim
33 words
A process for development-processing as in claim 16, wherein the developing agent is hydroquinone, an alkylhydroquinone, catechol, pyrazole, chlorohydroquinone, dichlorohydroquinone, an alkoxy hydroquinone, an aminophenol, an ascorbic acid, a pyrazolone, or a 3-pyrazolidone.
Claim 19
Dependent Claim
20 words
A process for development-processing as in claim 16, wherein the developing agent is a combination of hydroquinone and a 3-pyrazolidone.
Claim 20
Dependent Claim
20 words
A process for development-processing as in claim 16, wherein the developing agent is a combination of hydroquinone and an aminophenol.
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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |