Patent US4731320A successfully refreshed from Google Patents.
US4731320A
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Silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1986-08-13
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Granted: 1988-03-15
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Expires: 2006-08-13
Abstract
Abstract A silver halide photographic material having one or more silver halide emulsion layers formed on a support is disclosed wherein at least one of said silver halide emulsion layers contains at least one cyan coupler of formula (I) dispersed therein with the aid of a high-boiling organic solvent having a dielectric constant of not more than 6.0: ##STR1## (wherein R 1 is a straight- or branched-chain alkyl group having 2 or 4 carbon atoms; X is a hydrogen atom or a group capable of leaving upon coupling reaction; and R 2 is a ballast group).
Inventors
- 👤 Masao Sasaki
- 👤 Toyoki Nishijima
- 👤 Shun Takada
- 👤 Takashi Kadowaki
- 👤 Kaoru Onodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:22
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/346; G03C7/388; G03C7/3885
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A silver halide photographic material having one or more silver halide emulsion layers formed on a support, wherein at least one of said silver halide emulsion layers contains at least one cyan coupler of Formula (I) dispersed therein with the aid of a high-boiling organic solvent having a dielectric constant of not more than 6.0: ##STR37## wherein R 1 is a straight-or branched-chain alkyl group having 2 to 4 carbon atoms; X is a hydrogen atom or a group capable of leaving upon coupling reaction; R 3 is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms; and Ar is an aryl group.
Claim 2
Dependent Claim
107 words
A silver halide photographic material having one or more silver halide emulsion layers formed on a support, wherein at least one of said silver halide emulsion layers contains at least one cyan coupler of Formula (I) dispersed therein with the aid of a high-boiling organic solvent having a dielectric constant of not more than 6.0: ##STR37## wherein R 1 is a straight-or branched-chain alkyl group having 2 to 4 carbon atoms; X is a hydrogen atom or a group capable of leaving upon coupling reaction; R 3 is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms; and Ar is an aryl group.
Claim 3
Dependent Claim
25 words
A silver halide photographic material according to claim 1, wherein said high-boiling organic solvent is at least one selected from among phthalate and phosphate esters.
Claim 4
Dependent Claim
61 words
A silver halide photographic material according to claim 2, wherein said phthalate ester is represented by the following formula: ##STR38## wherein R 4 and R 5 are each an alkyl group, an alkenyl group or an aryl group, provided that the total number of carbon atoms of the groups represented by R 4 and R 5 is from 8 to 32.
Claim 5
Dependent Claim
34 words
A silver halide photographic material according to claim 3, wherein the total number of carbon atoms of the groups represented by R 4 and R 5 in said formula is from 16 to 24.
Claim 6
Dependent Claim
67 words
A silver halide photographic material according to claim 2, wherein said phosphate ester is represented by the following formula: ##STR39## wherein R 6 , R 7 and R 8 are each an alkyl group, an alkenyl group or an aryl group, provided that the total number of carbon atoms of the groups represented by R 6 , R 7 and R 8 is from 24 to 54.
Claim 7
Dependent Claim
41 words
A silver halide photographic material according to claim 1, which comprises, in sequence on the support, a yellow coupler--containing blue-sensitive silver halide emulsion layer, a magenta coupler--containing green-sensitive silver halide emulsion layer and a cyan coupler--containing red-sensitive silver halide 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) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |