US4565774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the formation of dye image
Assignee: Konica Minolta Inc
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Filing: 1984-10-18
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Granted: 1986-01-21
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Expires: 2004-10-18
Abstract
Abstract Method for forming a dye image comprising imagewise exposing and processing a silver halide light-sensitive color photographic material having a support and coated thereon a silver halide emulsion layer containing silver halide crystals, wherein said silver halide crystals consist essentially of crystals having at least 80 mole % of silver chloride, said developing taking place in a developer essentially free from bromide ion and having a pH value of at least 9.5, in the presence of a p-phenylenediamine color-developing agent and a compound of the formula ##STR1## having an acid dissociation constant of not more than 1×10 -8 and a solubility product with silver ion of not more than 1×10 -10 , wherein Z, together with N forms a heterocyclic ring, said compound.
Inventors
- 👤 Makoto Kajiwara
- 👤 Kaoru Onodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022; G03C7/392; G03C7/39208; G03C7/3924; G03C7/39244; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A method for forming a dye image comprising imagewise exposing and developing a silver halide light-sensitive color photographic material having a support and coated thereon at least one silver halide emulsion layer, each of said layers containing at least 80 mole % silver chloride, said developing taking place in a developer essentially free from bromide ion and having a pH value of at least 9.5, in the presence of a p-phenylenediamine color-developing agent and a compound of the formula ##STR6## having an acid dissociation constant of not more than 1×10 -8 and a solubility produce with silver ion of not more than 1×10 -10 , wherein Z, together with N, forms a heterocyclic ring.
Claim 2
Independent Claim
114 words
A method for forming a dye image comprising imagewise exposing and developing a silver halide light-sensitive color photographic material having a support and coated thereon at least one silver halide emulsion layer, each of said layers containing at least 80 mole % silver chloride, said developing taking place in a developer essentially free from bromide ion and having a pH value of at least 9.5, in the presence of a p-phenylenediamine color-developing agent and a compound of the formula ##STR6## having an acid dissociation constant of not more than 1×10 -8 and a solubility produce with silver ion of not more than 1×10 -10 , wherein Z, together with N, forms a heterocyclic ring.
Claim 3
Dependent Claim
36 words
A method for the formation of a dye image according to claim 1 wherein said heterocyclic ring is selected from the group consisting of benzimidazole ring, benzotriazole ring, purine ring, 8-azapurine ring and pyrazolo pyrimidine ring.
Claim 4
Dependent Claim
21 words
A method for the formation of a dye image according to claim 1 wherein said compound is added to the developer.
Claim 5
Dependent Claim
32 words
A method for the formation of a dye image according to claim 3 wherein the adding quantity of said compound is from 1 mg to 10 g per liter of the developer.
Claim 6
Dependent Claim
22 words
A method for the formation of a dye image according to claim 1 wherein the pH value is from 10 to 13.
Claim 7
Dependent Claim
20 words
A method for the formation of a dye image according to claim 1 wherein said layer is pure silver chloride.
Claim 8
Dependent Claim
33 words
A method for the formation of a dye image according to claim 1 wherein chloride ions are present in a quantity of from 2×10 -3 to 0.2 mole per liter of the developer.
Claim 9
Dependent Claim
21 words
A method for the formation of a dye image according to claim 2 wherein said compound is added to the developer.
Claim 10
Dependent Claim
32 words
A method for the formation of a dye image according to claim 8 wherein the adding quantity of said compoound is from 1 mg to 10 g per liter of the developer.
Claim 11
Dependent Claim
16 words
The method of claim 1 wherein said layer contains at least 90 mole % silver chloride.
Claim 12
Dependent Claim
27 words
A method for the formation of a dye image according to claim 1 wherein silver halide crystals in said layer have a mono dispersed crystal size distribution.
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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |