US4134767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photosensitive material for color photography
Assignee: Konica Minolta Inc
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Filing: 1977-03-28
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Granted: 1979-01-16
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Expires: 1997-03-28
Abstract
Abstract A method of bleaching an imagewise exposed and then developed silver halide photosensitive material for color photography wherein said material contains a red sensitive silver halide emulsion layer having at least one of a particular group of compounds and treating said photosensitive material with a bleaching or bleach-fixing solution containing an organic metal chelate compound.
Inventors
- 👤 Kaiichiro Sakazume
- 👤 Noboru Fujimori
- 👤 Eiichi Sakamoto
- 👤 Hidehiko Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:52
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A method of bleaching an imagewise exposed and then developed silver halide photosensitive material for color photography, the photosensitive material comprising a red sensitive silver halide emulsion layer having, in an amount of 0.005 to 0.5 g per mole of silver halide, at least one of the compounds represented by the following general formula: ##STR6## wherein R 1 and R 2 individually stand for substituted or unsubstituted alkyl; R 3 is alkyl or allyl; Y is hydrogen, halogen, alkyl or alkoxy; Z is a group of atoms necessary for forming a substituted or unsubstituted heterocyclic ring, said heterocyclic ring selected from the group consisting of thiazole, benzothiazole, naphthoselenazole, benzoselenazole, naphthothiazole, benzoxazole, and 1-3-dioxolo [4.5-f] benzothiazole; X is an anion; m and n are individually 1 or 2 provided that when m is 1, an inner salt is formed, said method comprising treating said photosensitive material with a bleaching or bleach-fixing solution containing an ethylenediamine tetraacetic acid iron complex salt.
Claim 2
Independent Claim
159 words
A method of bleaching an imagewise exposed and then developed silver halide photosensitive material for color photography, the photosensitive material comprising a red sensitive silver halide emulsion layer having, in an amount of 0.005 to 0.5 g per mole of silver halide, at least one of the compounds represented by the following general formula: ##STR6## wherein R 1 and R 2 individually stand for substituted or unsubstituted alkyl; R 3 is alkyl or allyl; Y is hydrogen, halogen, alkyl or alkoxy; Z is a group of atoms necessary for forming a substituted or unsubstituted heterocyclic ring, said heterocyclic ring selected from the group consisting of thiazole, benzothiazole, naphthoselenazole, benzoselenazole, naphthothiazole, benzoxazole, and 1-3-dioxolo [4.5-f] benzothiazole; X is an anion; m and n are individually 1 or 2 provided that when m is 1, an inner salt is formed, said method comprising treating said photosensitive material with a bleaching or bleach-fixing solution containing an ethylenediamine tetraacetic acid iron complex salt.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein the layer is a red-sensitive cyan-color-forming emulsion layer comprising a cyan coupler.
Claim 4
Dependent Claim
13 words
A method according to claim 1 wherein the solution further comprises sodium thiosulfate.
Claim 5
Dependent Claim
14 words
A method according to claim 1 wherein the solution further comprises a bleaching assistant.
Claim 6
Dependent Claim
30 words
A method according to claim 4 wherein the bleaching assistant is selected from the group consisting of potassium bromide, sodium bromide, sodium chloride, ammonium bromide, ammonium chloride, and potassium iodide.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |