US4111697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel antifogging and/or stabilizing compounds for silver halide photography
Assignee: Agfa Gevaert NV
•
Filing: 1977-03-10
•
Granted: 1978-09-05
•
Expires: 1997-03-10
Abstract
Abstract Photographic silver halide material developed in the presence of a novel antifogging or stabilizing compound which is present in the material and/or in the developing composition and corresponds to the following formula: ##STR1## wherein: Q is sulphur or selenium X is sulphur, selenium or oxygen Y is sulphur, selenium, oxygen or a single bond, R 1 stands for an alkyl group having no nitrogen containing substituents or an aryl group, R 2 represents the same groups as indicated for R 1 , provided that only when X represents sulphur or selenium nitrogen containing substituents of alkyl are excluded, R 3 stands for hydrogen, carboxy in acid or salt form, an alkyl group or an aryl group, and R 4 stands for hydrogen provided Y represents a single bond, an alkyl group having no nitrogen containing substituents, when Y represents sulphur or selenium and having no hydroxy substituents when Y represents a single bond and X as well as Q represent sulphur or selenium, or an aryl group, R 3 and R 4 may also form together an alkylene group provided Y is a single bond.
Inventors
- 👤 Robert Joseph Pollet
- 👤 Antoon Leon Vandenberghe
- 👤 Valere Frans Danckaert
- 👤 Jozef Frans Willems
- 👤 George Frans VAN Veelen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
199 words
A photographic material comprising a support and at least one light-sensitive silver halide emulsion layer wherein the emulsion layer and/or a hydrophilic colloid layer in water-permeable relationship with the emulsion layer includes a compound in a stabilizing or fog-inhibiting amount corresponding to the following general formula: ##STR29## wherein: Q is sulphur or selenium X is sulphur, selenium or oxygen Y is sulphur, selenium, oxygen or a single bond, R 1 stands for an alkyl group having no nitrogen containing substituents or an aryl group, R 2 represents the same groups as indicated for R 1 , provided that only when X represents sulphur or selenium nitrogen containing substituents of alkyl are excluded, R 3 stands for hydrogen, carboxy in acid or salt form, an alkyl group or an aryl group, and R 4 stands for hydrogen provided Y represents a single bond, an alkyl group having no nitrogen containing substituents when Y represents sulphur or selenium and having no hydroxy substituents when Y represents a single bond and X as well as Q represent sulphur or selenium, or an aryl group, R 3 and R 4 may also form together an alkylene grouup provided Y is a single bond.
Claim 2
Dependent Claim
199 words
A photographic material comprising a support and at least one light-sensitive silver halide emulsion layer wherein the emulsion layer and/or a hydrophilic colloid layer in water-permeable relationship with the emulsion layer includes a compound in a stabilizing or fog-inhibiting amount corresponding to the following general formula: ##STR29## wherein: Q is sulphur or selenium X is sulphur, selenium or oxygen Y is sulphur, selenium, oxygen or a single bond, R 1 stands for an alkyl group having no nitrogen containing substituents or an aryl group, R 2 represents the same groups as indicated for R 1 , provided that only when X represents sulphur or selenium nitrogen containing substituents of alkyl are excluded, R 3 stands for hydrogen, carboxy in acid or salt form, an alkyl group or an aryl group, and R 4 stands for hydrogen provided Y represents a single bond, an alkyl group having no nitrogen containing substituents when Y represents sulphur or selenium and having no hydroxy substituents when Y represents a single bond and X as well as Q represent sulphur or selenium, or an aryl group, R 3 and R 4 may also form together an alkylene grouup provided Y is a single bond.
Claim 3
Dependent Claim
24 words
A photographic material according to claim 1, wherein each of R 1 and R 2 are carboxy alkyl and X represents sulphur or selenium.
Claim 4
Dependent Claim
18 words
A photographic material according to claim 1, wherein the compound is present in the silver halide emulsion layer.
Claim 5
Dependent Claim
232 words
A process of inhibiting fog formation during processing of a photographic light-sensitive silver halide material comprising a support coated with water-permeable colloid layers including a lightsensitive silver halide emulsion layer, which process comprises imagewise exposing the said material and developing the same with a silver halide developing composition in the presence of a compound which is present in the water-permeable colloid layers or the developing composition in a stabilizing or fog-inhibiting amount and corresponds to the following general formula: ##STR30## wherein: Q is sulphur or selenium X is sulphur, selenium or oxygen Y is sulphur, selenium, oxygen or a single bond, R 1 stands for an alkyl group having no nitrogen containing substituents or an aryl group, R 2 represents the same groups as indicated for R 1 , provided that only when X represents sulphur or selenium nitrogen containing substituents of alkyl are excluded, R 3 stands for hydrogen, carboxy in acid or salt form, an alkyl group or an aryl group, and R 4 stands for hydrogen provided Y represents a single bond, an alkyl group having no nitrogen containing substituents when Y represents sulphur or selenium and having no hydroxy substituents when Y represents a single bond and X as well as Q represent sulphur or selenium, or an aryl group, R 3 and R 4 may also form together an alkylene group provided Y is a single bond.
Claim 6
Dependent Claim
232 words
A process of inhibiting fog formation during processing of a photographic light-sensitive silver halide material comprising a support coated with water-permeable colloid layers including a lightsensitive silver halide emulsion layer, which process comprises imagewise exposing the said material and developing the same with a silver halide developing composition in the presence of a compound which is present in the water-permeable colloid layers or the developing composition in a stabilizing or fog-inhibiting amount and corresponds to the following general formula: ##STR30## wherein: Q is sulphur or selenium X is sulphur, selenium or oxygen Y is sulphur, selenium, oxygen or a single bond, R 1 stands for an alkyl group having no nitrogen containing substituents or an aryl group, R 2 represents the same groups as indicated for R 1 , provided that only when X represents sulphur or selenium nitrogen containing substituents of alkyl are excluded, R 3 stands for hydrogen, carboxy in acid or salt form, an alkyl group or an aryl group, and R 4 stands for hydrogen provided Y represents a single bond, an alkyl group having no nitrogen containing substituents when Y represents sulphur or selenium and having no hydroxy substituents when Y represents a single bond and X as well as Q represent sulphur or selenium, or an aryl group, R 3 and R 4 may also form together an alkylene group provided Y is a single bond.
Claim 7
Dependent Claim
23 words
A process according to claim 4, wherein each of R 1 and R 2 are carboxy alkyl and X represents sulphur or selenium.
References Cited (Backward Citations)
US2819965A
Cited
US2897081A
Cited
US3155516A
Cited
US3554750A
Cited
US3689273A
Cited
SU1297797A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |