Patent US4157919A successfully refreshed from Google Patents.
US4157919A
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Silver halide emulsions containing yellow-dye-forming couplers
Assignee: Eastman Kodak Co
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Filing: 1978-03-31
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Granted: 1979-06-12
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Expires: 1998-03-31
Abstract
Abstract Novel bis yellow-dye-forming couplers are incorporated in photographic emulsions and elements. The couplers are represented by the structural formula ##STR1## where: R is an aryl group of 6 to 12 carbon atoms, an aryloxyalkylene or arylthioalkylene group having 6 to 12 carbon atoms in the aryl portion of the group and 1 to 4 carbon atoms in the alkylene portion of the group, or an alkyl group of 1 to 8 carbon atoms; R 1 is an alkyl group of 4 to 16 carbon atoms; R 2 represents one or more halogen, lower alkyl, lower alkoxy, carboxy or lower alkoxycarbonyl substituents wherein the alkyl group and the alkyl portion of the alkoxy and alkoxycarbonyl groups contain 1 to 6 carbon atoms; and X is sulfonyl, carbonyl or alkylenedisulfonamido containing 1 to 4 carbon atoms.
Inventors
- 👤 Philip T. S. Lau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:24
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A photographic element comprising a support bearing at least one layer of a photosensitive silver halide emulsion and a non-diffusible, yellow-dye-forming coupler having the structural formula: ##STR20## where: R is an aryl group of 6 to 12 carbon atoms, an aryloxyalkylene or arylthioalkylene group having 6 to 12 carbon atoms in the aryl portion of the group and 1 to 4 carbon atoms in the alkylene portion of the group, or an alkyl group of 1 to 8 carbon atoms; R 1 is an alkyl group of 4 to 16 carbon atoms; R 2 represents one or more halogen, lower alkyl, lower alkoxy, carboxy or lower alkoxycarbonyl substituents wherein the alkyl group and the alkyl portion of the alkoxy and alkoxycarbonyl groups contains 1 to 6 carbon atoms; and X is sulfonyl, carbonyl or alkylenedisulfonamido containing 1 to 4 carbon atoms.
Claim 2
Dependent Claim
141 words
A photographic element comprising a support bearing at least one layer of a photosensitive silver halide emulsion and a non-diffusible, yellow-dye-forming coupler having the structural formula: ##STR20## where: R is an aryl group of 6 to 12 carbon atoms, an aryloxyalkylene or arylthioalkylene group having 6 to 12 carbon atoms in the aryl portion of the group and 1 to 4 carbon atoms in the alkylene portion of the group, or an alkyl group of 1 to 8 carbon atoms; R 1 is an alkyl group of 4 to 16 carbon atoms; R 2 represents one or more halogen, lower alkyl, lower alkoxy, carboxy or lower alkoxycarbonyl substituents wherein the alkyl group and the alkyl portion of the alkoxy and alkoxycarbonyl groups contains 1 to 6 carbon atoms; and X is sulfonyl, carbonyl or alkylenedisulfonamido containing 1 to 4 carbon atoms.
Claim 3
Dependent Claim
18 words
A photograhic element of claim 1 wherein R is a t-alkyl group of 4 to 8 carbon atoms.
Claim 4
Dependent Claim
11 words
A photographic element of claim 2 wherein R 2 is halogen.
Claim 5
Dependent Claim
34 words
A photographic element of claim 1 wherein the non-diffusible yellow-dye-forming coupler has the structural formula: ##STR21## where R 1 is alkyl of 4 to 16 carbon atoms and X is sulfonyl, carbonyl or methylenedisulfonamido.
Claim 6
Dependent Claim
37 words
A photographic element comprising a support bearing at least one layer of a silver halide emulsion containing a non-diffusible yellow-dye-forming coupler having the structural formula: ##STR22## where R 1 is alkyl of 8 to 12 carbon atoms.
Claim 7
Dependent Claim
37 words
A photographic element comprising a support bearing at least one layer of a silver halide emulsion containing a non-diffusible yellow-dye-forming coupler having the structural formula: ##STR22## where R 1 is alkyl of 8 to 12 carbon atoms.
Claim 8
Dependent Claim
129 words
A photographic silver halide emulsion containing a non-diffusible yellow-dye-forming coupler having the structural formula: ##STR23## where: R is an aryl group of 6 to 12 carbon atoms, an aryloxyalkylene or arylthioalkylene group having 6 to 12 carbon atoms in the aryl portion of the group and 1 to 4 carbon atoms in the alkylene portion of the group, or an alkyl group of 1 to 8 carbon atoms; R 1 is an alkyl group of 4 to 16 carbon atoms; R 2 represents one or more halogen, lower alkyl, lower alkoxy, carboxy or lower alkoxycarbonyl substituents wherein the alkyl group and the alkyl portion of the alkoxy and alkoxycarbonyl groups contains 1 to 6 carbon atoms; and X is sulfonyl, carbonyl or alkylenedisulfonamido containing 1 to 4 carbon atoms.
Claim 9
Dependent Claim
129 words
A photographic silver halide emulsion containing a non-diffusible yellow-dye-forming coupler having the structural formula: ##STR23## where: R is an aryl group of 6 to 12 carbon atoms, an aryloxyalkylene or arylthioalkylene group having 6 to 12 carbon atoms in the aryl portion of the group and 1 to 4 carbon atoms in the alkylene portion of the group, or an alkyl group of 1 to 8 carbon atoms; R 1 is an alkyl group of 4 to 16 carbon atoms; R 2 represents one or more halogen, lower alkyl, lower alkoxy, carboxy or lower alkoxycarbonyl substituents wherein the alkyl group and the alkyl portion of the alkoxy and alkoxycarbonyl groups contains 1 to 6 carbon atoms; and X is sulfonyl, carbonyl or alkylenedisulfonamido containing 1 to 4 carbon atoms.
Claim 10
Dependent Claim
20 words
A photographic silver halide emulsion of claim 6 wherein R is a t-alkyl group of 4 to 8 carbon atoms.
Claim 11
Dependent Claim
13 words
A photographic silver halide emulsion of claim 7 wherein R 2 is halogen.
Claim 12
Dependent Claim
36 words
A photographic silver halide emulsion of claim 6 wherein the non-diffusible yellow-dye-forming coupler has the structural formula: ##STR24## where R 1 is alkyl of 4 to 16 carbon atoms and X is sulfonyl, carbonyl or methylenedisulfonamido.
Claim 13
Dependent Claim
26 words
A photographic silver halide emulsion containing a non-diffusible yellow-dye-forming coupler having the structural formula: ##STR25## where R 1 is alkyl of 8 to 12 carbon atoms.
Claim 14
Dependent Claim
26 words
A photographic silver halide emulsion containing a non-diffusible yellow-dye-forming coupler having the structural formula: ##STR25## where R 1 is alkyl of 8 to 12 carbon atoms.
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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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |