US3910790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic materials processed in the presence of anti-color fogging agents
Assignee: Agfa Gevaert AG
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Filing: 1974-01-25
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Granted: 1975-10-07
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Expires: 1994-01-25
Abstract
Abstract A process for the production of colored images by chromogenic processing of color photographic materials with at least one silver halide emulsion layer wherein the material is processed in the presence of at least one 2-propinylthioderivative which are able to reduce the formation of color fogs.
Inventors
- 👤 Karl Lohmer
- 👤 Konig Anita Von
- 👤 Anneliese Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/392; G03C7/39208; G03C7/39228
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PRODUCTION OF COLORED IMAGES BY CHROMOGENIC PROCESSING OF COLOR PHOTOGRAPHIC MATERIAL HAVING AT LEAST ONE LIGHT SENSITIVE SILVER HALIDE EMULSION LAYER BY IMAGEWISE EXPOSURE AND PROCESSING COLOR PHOTOGRAPHIC PROCESSING BATH COMPRISING COLOR DEVELOPING WITH A COLOR DEVELOPER AND COLOR AND SAID PROCESS INCLUDING PROCESSING IN THE PRESENCE OF A STABILIZING AGENT WHEREIN THE IMPROVEMENT COMPRISES PROCESSING THE EXPOSED PHOTOGRAPHIC MATERIAL IN THE PRESENCE OF A STABLIZING AMOUNT OF A 2-POLYNYTHIO DERIVATIVE OF THE FORMULA
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF COLORED IMAGES BY CHROMOGENIC PROCESSING OF COLOR PHOTOGRAPHIC MATERIAL HAVING AT LEAST ONE LIGHT SENSITIVE SILVER HALIDE EMULSION LAYER BY IMAGEWISE EXPOSURE AND PROCESSING COLOR PHOTOGRAPHIC PROCESSING BATH COMPRISING COLOR DEVELOPING WITH A COLOR DEVELOPER AND COLOR AND SAID PROCESS INCLUDING PROCESSING IN THE PRESENCE OF A STABILIZING AGENT WHEREIN THE IMPROVEMENT COMPRISES PROCESSING THE EXPOSED PHOTOGRAPHIC MATERIAL IN THE PRESENCE OF A STABLIZING AMOUNT OF A 2-POLYNYTHIO DERIVATIVE OF THE FORMULA
Claim 3
Dependent Claim
26 words
A process according to claim 1 wherein R1 represents alkyl containing up to 18 carbon atoms, 1,3,4-thiadiazole, 1,2,4-triazole, a benzothiazole, a benzimidazole or a carboxyphenyl group.
Claim 4
Dependent Claim
17 words
A process according to claim 1 wherein the 2-propynylthio derivative is present in the color photographic material.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein the 2-propinylthio derivative used is present in a photographic processing bath.
Claim 6
Dependent Claim
23 words
A process according to claim 4 wherein the processing bath used is a stopping bath, fixing bath, hardening bath or a rinsing bath.
Claim 7
Dependent Claim
87 words
A light sensitive color photographic material comprising at least one silver halide emulsion layer and a stabilizing agent the improvement according to which the stabilizing agent capable of stabilizing a color photographic material against the formation of color fog is a 2-propynylthio derivative of the formula R1-S-CH2-C*C-R2 in which R1 represents an alkyl, aryl or heterocyclic group selected from the group consisting of imidazole, oxazole, thiazole, triazole, tetrazole, oxdiazole, thiadiazole, benzimidazole, benzoxazole, benzthiazole, pyridine, pyrimidine, triazine, quinoline, quinazoline, purine, s-triazolo-(4,3-a)-quinoline and R2 represents hydrogen, sodium or potassium.
Claim 8
Dependent Claim
87 words
A light sensitive color photographic material comprising at least one silver halide emulsion layer and a stabilizing agent the improvement according to which the stabilizing agent capable of stabilizing a color photographic material against the formation of color fog is a 2-propynylthio derivative of the formula R1-S-CH2-C*C-R2 in which R1 represents an alkyl, aryl or heterocyclic group selected from the group consisting of imidazole, oxazole, thiazole, triazole, tetrazole, oxdiazole, thiadiazole, benzimidazole, benzoxazole, benzthiazole, pyridine, pyrimidine, triazine, quinoline, quinazoline, purine, s-triazolo-(4,3-a)-quinoline and R2 represents hydrogen, sodium or potassium.
Claim 9
Dependent Claim
34 words
A light sensitive color photographic material according to claim 6 wherein R1 represents alkyl containing up to 18 carbon atoms, a carboxy phenyl group, or a 1,3,4-thiadiazole, a 1,2,4-triazole, a benzothiazole or benzimidazole group.
References Cited (Backward Citations)
US3679423A
Cited
US3772023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |