US4458010A
Expired / Lapsed
US
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Process for bleaching color photographic sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1982-11-12
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Granted: 1984-07-03
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Expires: 2002-11-12
Abstract
Abstract A process for bleaching color photographic sensitive materials and color photographic sensitive materials are disclosed. The process comprises bleaching the silver halide color photographic sensitive materials which are comprised of a support base, a silver halide emulsion layer, and a compound represented by the general formula (I) or strong acid salts thereof in a layer which does not substantially form silver salts of said compounds with a treating solution containing persulfate after being exposed to the light and carrying out color development: ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group, an amidino group or ##STR2## R 1 and R 2 each represents a hydrogen atom or an aliphatic group, and m represents an integer of 2 to 4. The bleaching process effectively bleaches color sensitive materials having a high silver content and/or a colloidal silver layer without creating a bad odor.
Inventors
- 👤 Kiyohiko Yamamuro
- 👤 Shigeo Hirano
- 👤 Yasuo Iwasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:45
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; G03C7/00; G03C7/30; G03C7/42; G03C7/421
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
120 words
A process for bleaching color photographic sensitive materials which comprises bleaching a silver halide color photographic sensitive material comprising a support base, a silver halide emulsion layer and a compound represented by the general formula (I) or strong acid salts thereof in a layer which does not substantially form silver salts of said compounds with a treating solution containing persulfate after being exposed to light and carrying out color development: ##STR17## wherein M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group, an amidino group ##STR18## R 1 and R 2 each represents a hydrogen atom or an aliphatic group, and m represents an integer of 2 to 4.
Claim 2
Dependent Claim
120 words
A process for bleaching color photographic sensitive materials which comprises bleaching a silver halide color photographic sensitive material comprising a support base, a silver halide emulsion layer and a compound represented by the general formula (I) or strong acid salts thereof in a layer which does not substantially form silver salts of said compounds with a treating solution containing persulfate after being exposed to light and carrying out color development: ##STR17## wherein M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group, an amidino group ##STR18## R 1 and R 2 each represents a hydrogen atom or an aliphatic group, and m represents an integer of 2 to 4.
Claim 3
Dependent Claim
91 words
A process for bleaching color photographic sensitive materials according to claim 1, wherein said silver halide color photographic sensitive material additionally contains a compound represented by the general formula (II): ##STR19## wherein Q represents a hydrogen atom, an alkali metal atom or a quaternary ammonium group, and R 3 and R 4 , which may be the same or different, each represents a hydrogen atom, a nonsubstituted or substituted aliphatic group or a nonsubstituted or substituted aromatic group, and R 3 and R 4 may form a ring by bonding together.
Claim 4
Dependent Claim
33 words
A process for bleaching color photographic sensitive materials as claimed in any of claims 1 or 2, wherein the alkali metal atom is selected from the group consisting of lithium, sodium and potassium.
Claim 5
Dependent Claim
28 words
A process for bleaching color photographic sensitive materials as claimed in claim 1, wherein the alkaline earth metal is selected from the group consisting of calcium and magnesium.
Claim 6
Dependent Claim
29 words
A process for bleaching color photographic sensitive materials as claimed in claim 1, wherein the quaternary ammonium group or quaternary phosphonium group each contains up to 30 carbon atoms.
Claim 7
Dependent Claim
34 words
A process for bleaching color photographic sensitive materials as claimed in claim 1, wherein R 1 and R 2 each represents a hydrogen atom or an aliphatic group containing 1 to 30 carbon atoms.
Claim 8
Dependent Claim
29 words
A process for bleaching color photographic sensitive materials as claimed in claim 6, wherein R 1 and R 2 represent an alkyl group containing 1 to 5 carbon atoms.
Claim 9
Dependent Claim
47 words
A process for bleaching color photographic sensitive materials as claimed in any of claims 1 or 2, wherein the compound represented by the general formula (I) is present in an amount of 1×10 -7 mol to 1×10 -3 mol per square meter of the photographic sensitive material.
Claim 10
Dependent Claim
43 words
A process for bleaching color photographic sensitive materials as claimed in claim 8, wherein the compound represented by the general formula (I) is present in an amount of 1×10 -6 mol to 1×10 -4 mol per square meter of the photographic sensitive material.
Claim 11
Dependent Claim
32 words
A process for bleaching color photographic sensitive materials as claimed in claim 2, wherein R 3 and R 4 each represents an alkyl or alkenyl group having 18 or less carbon atoms.
Claim 12
Dependent Claim
30 words
A process for bleaching color photographic sensitive materials as claimed in claim 2, wherein R 3 and R 4 each represents an aryl group containing 6 to 20 carbon atoms.
Claim 13
Dependent Claim
38 words
A process for bleaching color photographic sensitive materials as claimed in claim 2, wherein the compound represented by the general formula (II) is present in an amount of 1×10 -2 mol to 100 mols per mol of silver.
Claim 14
Dependent Claim
38 words
A process for bleaching color photographic sensitive materials as claimed in claim 12, wherein the compound represented by the general formula (II) is present in an amount of 1×10 -1 mol to 10 mols per mol of silver.
Claim 15
Dependent Claim
32 words
A process for bleaching color photographic sensitive materials as claimed in any of claims 1 or 2, wherein the bleaching is carried out utilizing bleaching solution containing persulfates as the bleaching agent.
Claim 16
Dependent Claim
34 words
A process for bleaching color photographic sensitive materials as claimed in claim 14, wherein the persulfate bleaching agents are selected from the group of agents consisting of potassium persulfate, sodium persulfate and ammonium persulfate.
Claim 17
Dependent Claim
38 words
A process for bleaching color photographic sensitive materials as claimed in any of claims 1 or 2, wherein the bleaching is carried out utilizing a bleaching solution having a pH within the range of from 1 to 7.
Claim 18
Dependent Claim
29 words
A process for bleaching color photographic sensitive materials as claimed in claim 16, wherein the pH of the bleaching solution is within the range of from 1.5 to 3.5.
Claim 19
Dependent Claim
86 words
A silver halide color photographic sensitive material, comprising: a support base; a silver halide emulsion layer on the support base; and a compound represented by the general formula (I) or a strong acid salt thereof: ##STR20## wherein M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group, an amidino group or ##STR21## R 1 and R 2 each represents a hydrogen atom or an aliphatic group, and m represents an integer of 2 to 4.
Claim 20
Dependent Claim
86 words
A silver halide color photographic sensitive material, comprising: a support base; a silver halide emulsion layer on the support base; and a compound represented by the general formula (I) or a strong acid salt thereof: ##STR20## wherein M represents a hydrogen atom, an alkali metal atom, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group, an amidino group or ##STR21## R 1 and R 2 each represents a hydrogen atom or an aliphatic group, and m represents an integer of 2 to 4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |