Patent US4201584A successfully refreshed from Google Patents.
US4201584A
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Silver halide elements containing yellow forming color couplers for silver halide photography
Assignee: Agfa Gevaert NV
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Filing: 1978-09-19
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Granted: 1980-05-06
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Expires: 1998-09-19
Abstract
Abstract Novel color forming couplers for use in silver halide color photography are described. These couplers upon oxidative coupling with an aromatic primary amino color developing agent produce dyes of improved stability against light and dyes having favorable spectral absorption characteristics. The couplers have high coupling activity and thus produce high color densities. The novel couplers are acylacetanilide compounds whereof the phenyl nucleus of the anilide group carries oxyhydrocarbon groups, preferably alkoxy groups in the 2-, 4- and 5-position with respect to the amido group.
Inventors
- 👤 Marcel J. Monbaliu
- 👤 Raphael K. Van Poucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A method of producing a yellow coloured photographic image in a photographic light-sensitive silver halide material by image-wise exposure of the material and development thereof by means of an aromatic primary amino colour developing agent in the presence of an acylacetanilide compound suitable for use as yellow-forming colour coupler in silver halide colour photography characterized in that the acylacetanilide is one whereof the phenyl nucleus of the anilide group of the molecule carries oxyhydrocarbon groups in the 2-, 4- and 5-positions with respect to the amido group.
Claim 2
Independent Claim
87 words
A method of producing a yellow coloured photographic image in a photographic light-sensitive silver halide material by image-wise exposure of the material and development thereof by means of an aromatic primary amino colour developing agent in the presence of an acylacetanilide compound suitable for use as yellow-forming colour coupler in silver halide colour photography characterized in that the acylacetanilide is one whereof the phenyl nucleus of the anilide group of the molecule carries oxyhydrocarbon groups in the 2-, 4- and 5-positions with respect to the amido group.
Claim 3
Dependent Claim
76 words
A method according to claim 1, wherein the phenyl nucleus of the anilide group of the molecule of the colour coupler contains, relative to the amide link, in the 5-position a C 1 -C 5 alkoxy group and in the 2- and 4-positions an alkoxy group including a substituted alkoxy group or an aryloxy group including a substituted aryloxy group, at least one of the 2- and 4-positions carrying a C 1 -C 5 alkoxy group.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein the colour coupler is a benzoyl or pivaloyl acetanilide colour coupler.
Claim 5
Dependent Claim
150 words
A method according to claim 2, wherein the colour coupler can be represented by the following general formula: ##STR15## wherein R represents alkyl or phenyl including substituted phenyl, R 1 is C 1 -C 5 alkyl, each of R 2 and R 3 may represent a C 1 -C 20 alkoxy group including a substituted C 1 -C 20 alkyl group or an aryl group including a substituted aryl group at least one of R 2 and R 3 being a C 1 -C 5 alkyl, and X represents a hydrogen atom or substituent that exhibits two equivalent character on colour development, preferably a halogen atom, a --S--R' group wherein R' is alkyl, substituted alkyl, aryl, substituted aryl, or a heterocycle or substituted heterocycle, a --O--R" group wherein R" is alkyl, substituted alkyl, aryl, substituted aryl, a heterocycle or acyl, or a 5- or 6-membered N-containing saturated or unsaturated heterocycle.
Claim 6
Dependent Claim
48 words
A photographic element comprising at least one silver halide emulsion layer and an acylacetanilide colour coupler wherein the colour coupler is one whereof the phenyl nucleus of the anilide group of the molecule carries oxyhydrocarbon groups in the 2-, 4- and 5-positions with respect to the amido group.
Claim 7
Dependent Claim
48 words
A photographic element comprising at least one silver halide emulsion layer and an acylacetanilide colour coupler wherein the colour coupler is one whereof the phenyl nucleus of the anilide group of the molecule carries oxyhydrocarbon groups in the 2-, 4- and 5-positions with respect to the amido group.
Claim 8
Dependent Claim
77 words
A photographic element according to claim 5, wherein the phenyl nucleus of the anilide group of the molecule of the colour coupler contains, relative to the amide link, in the 5-position a C 1 -C 5 alkoxy group and in the 2- and 4-positions an alkoxy group including a substituted alkoxy group or an aryloxy group including a substituted aryloxy group, at least one of the 2- and 4-positions carrying a C 1 -C 5 alkoxy group.
Claim 9
Dependent Claim
19 words
A photographic element according to claim 5, wherein the colour coupler is a benzoyl or pivaloyl acetanilide colour coupler.
Claim 10
Dependent Claim
151 words
A photographic element according to claim 5, wherein the colour coupler can be represented by the following general formula: ##STR16## wherein R represents alkyl or phenyl including substituted phenyl, R 1 is C 1 -C 5 alkyl, each of R 2 and R 3 may represent a C 1 -C 20 alkyl group including a substituted C 1 -C 20 alkyl group or an aryl group including a substituted aryl group at least one of R 2 and R 3 being a C 1 -C 5 alkyl, and X represents a hydrogen atom or substituent that exhibits two equivalent character on colour development, preferably a halogen atom, a --S--R' group wherein R' is alkyl, substituted alkyl, aryl, substituted aryl, or a heterocycle or substituted heterocycle, a --O--R" group wherein R" is alkyl, substituted alkyl, aryl, substituted aryl, a heterocycle or acyl, or a 5- or 6-membered N-containing saturated or unsaturated heterocycle.
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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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |