Patent US4950585A successfully refreshed from Google Patents.
US4950585A
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US
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Coupler for photographic use
Assignee: Konica Minolta Inc
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Filing: 1988-08-03
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Granted: 1990-08-21
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Expires: 2008-08-03
Abstract
Abstract A novel cyan color-forming coupler for photographic use is disclosed. The coupler has a improved fastness for heat, humidity, and has a chemical structure represented by the following Formula I; ##STR1## wherein Z is a group of non-metal atoms necessary for completing a nitrogen-containing six-member heterocyclic ring condensed with the pyrazole ring. The six-member ring may be substituted or not substituted provided that the six-member ring does not have be condensed with any ring other than the pyrazole ring; R represents a hydrogen atom or a substituent, and X represents a hydrogen atom or a substituent capable of being split off upon reaction with the oxidized product of a color developing agent.
Inventors
- 👤 Kimie Tachibana
- 👤 Yutaka Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:57
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/381; G03C7/382; G03C7/3825
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A method of forming a photographic dye image, said method comprising; imagewise exposing to light, a silver halide photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing a coupler represented by the following formula: ##STR53## wherein Z is a group of non-metal atoms necessary to complete a nitrogen-containing six-member heterocyclic ring condensed with the pyrazole ring, said six-member ring being optionally substituted; provided that said six-member ring is not condensed with any ring other than said pyrazole ring; R represents a hydrogen atom or a substituent, and X represents a hydrogen atom or a substituent capable of splitting off upon reaction with an oxidized product of a color developing agent and; developing said silver halide photographic light-sensitive material with a color developer containing a color developing agent.
Claim 2
Independent Claim
132 words
A method of forming a photographic dye image, said method comprising; imagewise exposing to light, a silver halide photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing a coupler represented by the following formula: ##STR53## wherein Z is a group of non-metal atoms necessary to complete a nitrogen-containing six-member heterocyclic ring condensed with the pyrazole ring, said six-member ring being optionally substituted; provided that said six-member ring is not condensed with any ring other than said pyrazole ring; R represents a hydrogen atom or a substituent, and X represents a hydrogen atom or a substituent capable of splitting off upon reaction with an oxidized product of a color developing agent and; developing said silver halide photographic light-sensitive material with a color developer containing a color developing agent.
Claim 3
Dependent Claim
81 words
The method of claim 1 wherein said coupler is represented by the following formula: ##STR54## wherein Z 1 represents a group of non-metal atoms necessary to complete a nitrogen-containing six-member ring condensed with the pyrazole ring of Formula II, said six-member ring containing an -NY- group and a carbonyl group, and not being condensed with any ring other than said pyrazole ring; Y represents a hydrogen atom or a substituent; and R and X are the same as in Formula I.
Claim 4
Dependent Claim
53 words
The method of claim 2 wherein said coupler is represented by the following formula: ##STR55## wherein R 1 R 2 and R 3 are the same as R denoted in Formula I, provided that R 2 is not a hydroxy group; and X and Y are the same as defined in Formula II.
Claim 5
Dependent Claim
45 words
The method of claim 2 wherein said coupler is represented by the following formula: ##STR56## wherein R 1 , R 2 , and R 3 are the same as R of Formula I, and X and Y are the same as defined in Formula II.
Claim 6
Dependent Claim
34 words
The method of claim 4 wherein said coupler is represented by the following formula: ##STR57## wherein R 1 , R 2 , R 3 and X are the same as defined in Formula IV.
Claim 7
Dependent Claim
30 words
The method of claim 1 wherein said coupler is present in said silver halide emulsion layer in an amount of 1×10 -3 to 1 mol per mol of silver halide.
Claim 8
Dependent Claim
32 words
The method of claim 6 wherein said coupler is present in said silver halide emulsion layer in an amount of from 1×10 -2 to 8×10 -1 mol per mol of silver halide.
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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |