US4004929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color corrected photographic elements
Assignee: Eastman Kodak Co
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Filing: 1975-03-21
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Granted: 1977-01-25
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Expires: 1995-03-21
Abstract
Abstract Photographic elements containing at least one silver halide emulsion layer in which there is incorporated a cyan-color forming material which, upon reaction with oxidized color developer, forms a cyan dye having unwanted absorption in the green and blue regions of the visible spectrum can be color corrected to a surprising degree by the incorporation into said element of a colored coupler compound having the structure: ##STR1## wherein R 2 is an alkyl group containing 1 to 6 carbon atoms, R 3 and R 4 are independently selected and are alkyl groups containing 2 to 6 carbon atoms, B is hydrogen or CooR 6 wherein R 6 is an alkyl group containing 1 to 8 carbon atoms, and A is a sulfonated naphthylazo group selected from those having the structure: ##STR2## wherein R 5 is an alkyl group containing 1 to 4 carbon atoms, M is photographically inactive, M is a monovalent cation.
Inventors
- 👤 Roy L. Orvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
193 words
In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated in said layer (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color developing agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent; the improvement wherein said naphtholic coupler has the structure: ##STR18## wherein R and R 1 are independently selected and are alkyl groups containing 1 to 8 carbon atoms and n is an integer from 1 to 6; and said colored coupler compound has the structure ##STR19##wherein R 2 is an alkyl group containing 1 to 6 carbon atoms, R 3 and R 4 are independently selected and are alkyl groups containing 2 to 6 carbon atoms, B is hydrogen or COOR 6 wherein R 6 is alkyl containing 1 to 8 carbon atoms and A is a sulfonated naphthylazo group selected from those having the structure: ##STR20##wherein R 5 is an alkyl group containing 1 to 4 carbon atoms, M is a photographically inactive monovalent cation.
Claim 2
Dependent Claim
193 words
In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated in said layer (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color developing agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent; the improvement wherein said naphtholic coupler has the structure: ##STR18## wherein R and R 1 are independently selected and are alkyl groups containing 1 to 8 carbon atoms and n is an integer from 1 to 6; and said colored coupler compound has the structure ##STR19##wherein R 2 is an alkyl group containing 1 to 6 carbon atoms, R 3 and R 4 are independently selected and are alkyl groups containing 2 to 6 carbon atoms, B is hydrogen or COOR 6 wherein R 6 is alkyl containing 1 to 8 carbon atoms and A is a sulfonated naphthylazo group selected from those having the structure: ##STR20##wherein R 5 is an alkyl group containing 1 to 4 carbon atoms, M is a photographically inactive monovalent cation.
Claim 3
Dependent Claim
39 words
An improved photographic element as in claim 1 wherein said naphtholic coupler is 1-hydroxy-2-[α(2,4-di-t-pentylphenoxy)-n-butyl]-naphthamide, R 2 is ethyl, R 3 and R 4 are pentyl, R 5 is methyl, R 6 is butyl, and A has the structure V.
Claim 4
Dependent Claim
24 words
An improved photographic element as in claim 2 wherein M is pyridine and A is a para or ortho substituent on the phenoxy group.
Claim 5
Dependent Claim
17 words
An improved photographic element as in claim 1, wherein said colored coupler compound has the structure: ##STR21##
Claim 6
Dependent Claim
88 words
In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated therein, (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color development agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent; the improvement wherein said naphtholic coupler has the structure: ##STR22##and said colored coupler compound has the structure: ##STR23##wherein M 1 is tertiary amine.
Claim 7
Dependent Claim
88 words
In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated therein, (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color development agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent; the improvement wherein said naphtholic coupler has the structure: ##STR22##and said colored coupler compound has the structure: ##STR23##wherein M 1 is tertiary amine.
Claim 8
Dependent Claim
14 words
An improved photographic element as in claim 5 wherein said M 1 is pyridine.
Claim 9
Dependent Claim
100 words
In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent; said dye having unwanted absorption in the green and blue regions of the spectrum; and at least one green- and blue-absorbing color coupler compound capable of forming a cyan dye and simultaneously losing a part of its capability to absorb green and blue light upon reaction with said color-developing agent; the improvement wherein said green- and blue-absorbing color coupler is ##STR24##
Claim 10
Dependent Claim
100 words
In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent; said dye having unwanted absorption in the green and blue regions of the spectrum; and at least one green- and blue-absorbing color coupler compound capable of forming a cyan dye and simultaneously losing a part of its capability to absorb green and blue light upon reaction with said color-developing agent; the improvement wherein said green- and blue-absorbing color coupler is ##STR24##
Claim 11
Dependent Claim
100 words
In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent; said dye having unwanted absorption in the green and blue regions of the spectrum; and at least one green- and blue-absorbing color coupler compound capable of forming a cyan dye and simultaneously losing a large part of its capability to absorb green and blue light upon reaction with said color-developing agent; the improvement wherein said green- and blue-absorbing color coupler is
Claim 12
Dependent Claim
100 words
In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent; said dye having unwanted absorption in the green and blue regions of the spectrum; and at least one green- and blue-absorbing color coupler compound capable of forming a cyan dye and simultaneously losing a large part of its capability to absorb green and blue light upon reaction with said color-developing agent; the improvement wherein said green- and blue-absorbing color coupler is
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |