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US4791052A
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Silver halide photographic light-sensitive material
Assignee: Konica Minolta Inc
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Filing: 1987-03-27
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Granted: 1988-12-13
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Expires: 2007-03-27
Abstract
Abstract A silver halide photographic light-sensitive material containing a 1H-pyrazolo[3,2-c]-s-triazole type magenta coupler is disclosed. The magenta coupler has an --SO 2 -- group and at least one group selected from the group consisting of a --COOM group and a --SO 3 M group, M being a hydrogen atom or a cation, in its molecule. The photographic material is improved in color development performance and preservability of magenta images.
Inventors
- 👤 Shuji Kida
- 👤 Noritaka Nakayama
- 👤 Katsunori Katoh
- 👤 Takako Tanaka
- 👤 Satoshi Nakagawa
- 👤 Kosaku Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:06
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30529; G03C7/32; G03C7/36; G03C7/38; G03C7/381; G03C7/382; G03C7/3825; G03C7/3835
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A silver halide light-sensitive material comprising a support and at least one silver halide emulsion layer provided thereon, wherein said emulsion layer contains a 1H-pyrazolo[3,2-c]-s-triazole type magenta coupler having an --SO 2 --group in the third or sixth position of the coupler and at least one group selected from the group consisting of a --COOM group and a --SO 3 M group in the third or sixth position of the coupler, M being a hydrogen atom or a cation, in the molecule thereof.
Claim 2
Dependent Claim
83 words
A silver halide light-sensitive material comprising a support and at least one silver halide emulsion layer provided thereon, wherein said emulsion layer contains a 1H-pyrazolo[3,2-c]-s-triazole type magenta coupler having an --SO 2 --group in the third or sixth position of the coupler and at least one group selected from the group consisting of a --COOM group and a --SO 3 M group in the third or sixth position of the coupler, M being a hydrogen atom or a cation, in the molecule thereof.
Claim 3
Dependent Claim
160 words
The silver halide light-sensitive material of claim 1, wherein said magenta coupler is represented by formula (I) or (II). ##STR23## wherein R 1 and R 2 are each a bivalent group, R 3 is a hydrogen atom, an alkyl group, an aryl group, an alkylthio group, an acyl group, an alkoxy group, ##STR24## or a heterocyclic group, R 4 and R 5 are each an alkyl group or an aryl group, X is a monovalent group having said --COOM group or said --SO 3 M group, Z 1 is a group capable of being split off from the coupler residue upon reaction of the coupler residue with an oxidized product of a color developing agent and n is 0 or 1, ##STR25## wherein R 1 ', R 2 ', R 3 ', X', Z 1 ', and n', are the same as R 1 , R 2 , R 3 , X, Z 1 and n in formula (I), respectively.
Claim 4
Dependent Claim
27 words
The silver halide photographic light-sensitive material of claim 2, wherein R 1 and R 2 ' are each an alkylene group having one to five carbon atoms.
Claim 5
Dependent Claim
20 words
The silver halide photographic light-sensitive material of claim 2, wherein R 2 and R 2 ' are each group. ##STR26##
Claim 6
Dependent Claim
34 words
The silver halide photographic light-sensitive material of claim 2, an amount of said magenta coupler in said emulsion layer is from 0.01 to 2 mol per mol of silver contained in said emulsion layer.
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) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |