US3989529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic coupler solutions
Assignee: Eastman Kodak Co
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Filing: 1974-10-29
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Granted: 1976-11-02
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Expires: 1994-10-29
Abstract
Abstract Hydrophilic coupler solutions are improved by the addition of a diepoxide, pyruvaldehyde, ethyleneglycoldiglycidyl ether or 2,3-butanedione. These solutions exhibit greater stability and a reduced rate of viscosity increase when admixed into gelatin silver halide emulsions.
Inventors
- 👤 Felix Viro
- 👤 Salvatore Emmi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:09
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3885; G03C7/32
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
53 words
A hydrophilic color coupler solution for use in gelatin silver halide emulsions comprising a water soluble color coupler having at least one solubilizing moiety selected from the group consisting of sulfo and carboxy moieties and an additive selected from the group consisting of a diepoxide, ethylene glycol diglycidyl ether, pyruvaldehyde and 2,3 butanedione.
Claim 2
Dependent Claim
53 words
A hydrophilic color coupler solution for use in gelatin silver halide emulsions comprising a water soluble color coupler having at least one solubilizing moiety selected from the group consisting of sulfo and carboxy moieties and an additive selected from the group consisting of a diepoxide, ethylene glycol diglycidyl ether, pyruvaldehyde and 2,3 butanedione.
Claim 3
Dependent Claim
27 words
A coupler solution according to claim 1 in which the additive is present in an amount ranging from about 1 to about 20 wt.% of the coupler.
Claim 4
Dependent Claim
25 words
A coupler solution according to claim 2 in which the additive is present in an amount ranging from 2 to 10 wt.% of the coupler.
Claim 5
Dependent Claim
14 words
A coupler solution according to claim 2 in which the additive is a diepoxide.
Claim 6
Dependent Claim
20 words
A coupler solution according to claim 4 in which the diepoxide is a resinous condensation product of glycerin and epichlorohydrin.
Claim 7
Dependent Claim
16 words
A coupler solution according to claim 2 in which the additive is ethylene glycol diglycidyl ether.
Claim 8
Dependent Claim
13 words
A coupler solution according to claim 2 in which the additive is pyruvaldehyde.
Claim 9
Dependent Claim
13 words
A coupler solution according to claim 2 in which the additive is 2,3-butanedione.
Claim 10
Dependent Claim
25 words
A coupler solution according to claim 2 in which the coupler is ##SPC3## and is present in a concentration between about 2 and about 20%.
Claim 11
Dependent Claim
19 words
A coupler solution according to claim 9 in which the additive is a resinous condensation of glycerine and epichlorohydrin.
Claim 12
Dependent Claim
15 words
A coupler solution according to claim 9 in which the additive is ethyleneglycol diglycidyl ether.
Claim 13
Dependent Claim
13 words
A coupler solution according to claim 9 in which the additive is pyruvaldehyde.
Claim 14
Dependent Claim
12 words
A coupler according to claim 9 in which the additive is 2,3-butanedione.
Claim 15
Dependent Claim
25 words
A coupler solution according to claim 2 in which the coupler is ##SPC4## and is present in a concentration between about 2 and about 20%.
Claim 16
Dependent Claim
20 words
A coupler solution according to claim 14 in which the additive is a resinous condensation product of glycerine and epichloruhydrin.
Claim 17
Dependent Claim
24 words
A coupler solution according to claim 2 in which the coupler is ##SPC5## and is present in concentration between about 2 and about 20%.
Claim 18
Dependent Claim
20 words
A coupler solution according to claim 16 in which the additive is a resinous condensation product of glycerine and epihorohydrin.
Claim 19
Dependent Claim
25 words
A coupler solution according to claim 2 in which the coupler is ##SPC6## and is present in a concentration between about 2 and about 20%.
Claim 20
Dependent Claim
20 words
A coupler solution according to claim 18 in which the additive is a resinous condensation product of glycerine and epichloruhydrin.
References Cited (Backward Citations)
US3050394A
Cited
US3288775A
Cited
US3413123A
Cited
US3632373A
Cited
DE1919603A1
Cited
US3676144A
Cited
US3749573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |