Patent US4328306A successfully refreshed from Google Patents.
US4328306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing method for color photographic materials
Assignee: Fujifilm Holdings Corp
•
Filing: 1980-08-27
•
Granted: 1982-05-04
•
Expires: 2000-08-27
Abstract
Abstract A method for bleaching silver halide color photographic materials is described using a bleach solution containing an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide, wherein the bleaching activity of the bleach solution can be effectively maintained for a long period of time by supplying thereto a replenisher composed separately of a composition containing hydrogen peroxide or a compound releasing hydrogen peroxide and a composition containing an organic acid metal complex salt, which are separately stored and added as a mixture thereof or separately to the bleach solution when the activity thereof is weakened during processing or during storage of the bleach solution.
Inventors
- 👤 Yoshio Idota
- 👤 Minoru Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:06
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C5/00; G03C5/26; G03C5/395; G03C5/3958; Y; Y10; Y10S; Y10S430/00; Y10S430/144
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
A method for processing silver halide color photographic materials comprising bleaching silver halide color photographic materials with a bleach solution containing an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide wherein said hydrogen peroxide or said compound releasing hydrogen peroxide is present in an amount providing at least 0.02 mol hydrogen peroxide per liter of bleach solution, while adding thereto a replenisher composed separately of a first composition containing hydrogen peroxide or a compound releasing hydrogen peroxide and a second composition containing an organic acid metal complex salt.
Claim 2
Independent Claim
94 words
A method for processing silver halide color photographic materials comprising bleaching silver halide color photographic materials with a bleach solution containing an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide wherein said hydrogen peroxide or said compound releasing hydrogen peroxide is present in an amount providing at least 0.02 mol hydrogen peroxide per liter of bleach solution, while adding thereto a replenisher composed separately of a first composition containing hydrogen peroxide or a compound releasing hydrogen peroxide and a second composition containing an organic acid metal complex salt.
Claim 3
Independent Claim
85 words
A method for replenishing a silver halide color photographic material bleaching solution comprising an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide wherein said hydrogen peroxide or said compound releasing hydrogen peroxide is present in an amount providing at least 0.02 mol hydrogen peroxide per liter of bleach solution, comprising adding to said bleaching solution separately a first composition containing hydrogen peroxide or a compound releasing hydrogen peroxide, and a second composition containing an organic acid metal complex salt.
Claim 4
Independent Claim
85 words
A method for replenishing a silver halide color photographic material bleaching solution comprising an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide wherein said hydrogen peroxide or said compound releasing hydrogen peroxide is present in an amount providing at least 0.02 mol hydrogen peroxide per liter of bleach solution, comprising adding to said bleaching solution separately a first composition containing hydrogen peroxide or a compound releasing hydrogen peroxide, and a second composition containing an organic acid metal complex salt.
Claim 5
Dependent Claim
63 words
A method as in claim 1 or 2 wherein the first composition contains hydrogen peroxide, or a compound releasing hydrogen peroxide, and a stabilizer for hydrogen peroxide, and the concentration of hydrogen peroxide or a compound releasing hydrogen peroxide therein is from about 5% to 50% by weight, and the second composition contains an iron aminopolycarboxylic acid complex salt and other bleaching components.
Claim 6
Dependent Claim
39 words
A method as in claim 1 or 2 wherein the first composition containing hydrogen peroxide or a compound releasing hydrogen peroxide is continuously added during processing, while the composition containing an organic acid metal complex salt is added intermittently.
Claim 7
Dependent Claim
48 words
A method as in claim 1 or 2 wherein the bleaching is performed continuously or intermittently without adding the replenisher, and when the activity of the bleach solution is degraded, the replenisher composed of the separate compositions is added to the bleach solution to reactivate the bleach solution.
Claim 8
Dependent Claim
27 words
A method as in claim 1 or 2 wherein first and second compositions forming the replenisher are stored in separate first and second tanks, respectively, before use.
Claim 9
Dependent Claim
35 words
A method as in claim 6 wherein the concentration of hydrogen peroxide or a compound releasing hydrogen peroxide in the first composition stored in the first tank is from about 10% to 50% by weight.
Claim 10
Dependent Claim
43 words
A method as in claim 1, 2, 3, 4, 5, 6 or 7 wherein the concentration of hydrogen peroxide or a compound releasing hydrogen peroxide in the replenisher is from about 0.5 to 3 times the initial concentration thereof in the bleach solution.
Claim 11
Dependent Claim
42 words
A method as in claim 1, 2, 3, 4, 5, 6 or 7 wherein the concentration of hydrogen peroxide or a compound releasing hydrogen peroxide in the replenisher is from 0.8 to 2 times the initial concentration thereof in the bleach solution.
Claim 12
Dependent Claim
40 words
A method as in claim 1, 2, 3, 4, 5, 6 or 7 wherein the concentration of organic acid metal complex salt in the replenisher is from about 0.5 to 3 times the initial concentration thereof in the bleach solution.
Claim 13
Dependent Claim
40 words
A method as in claim 1, 2, 3, 4, 5, 6 or 7 wherein the concentration of organic acid metal complex salt in the replenisher is from about 0.8 to 2 times the initial concentration thereof in the bleach solution.
Claim 14
Independent Claim
151 words
A method for processing silver halide color photographic materials comprising bleaching silver halide photographic materials with a bleach solution containing an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide, wherein said hydrogen peroxide or said compound releasing hydrogen peroxide is present in an amount providing at least 0.02 mol hydrogen peroxide per liter of bleach solution, while adding thereto a replenisher composed separately of a first composition containing hydrogen peroxide or a compound releasing hydrogen peroxides and a stabilizer for hydrogen peroxide, with the concentration of hydrogen peroxide or compound releasing hydrogen peroxide therein being about 5% to 50% by weight and wherein the concentration of hydrogen peroxide or compound releasing hydrogen peroxide is from about 0.5 to 3 times the initial concentration of hydrogen peroxide in the bleach solution and a second composition containing an iron aminopolycarboxylic acid complex salt and other bleaching components.
Claim 15
Independent Claim
151 words
A method for processing silver halide color photographic materials comprising bleaching silver halide photographic materials with a bleach solution containing an organic acid metal complex salt and hydrogen peroxide or a compound releasing hydrogen peroxide, wherein said hydrogen peroxide or said compound releasing hydrogen peroxide is present in an amount providing at least 0.02 mol hydrogen peroxide per liter of bleach solution, while adding thereto a replenisher composed separately of a first composition containing hydrogen peroxide or a compound releasing hydrogen peroxides and a stabilizer for hydrogen peroxide, with the concentration of hydrogen peroxide or compound releasing hydrogen peroxide therein being about 5% to 50% by weight and wherein the concentration of hydrogen peroxide or compound releasing hydrogen peroxide is from about 0.5 to 3 times the initial concentration of hydrogen peroxide in the bleach solution and a second composition containing an iron aminopolycarboxylic acid complex salt and other bleaching components.
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) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |