Patent US3907572A successfully refreshed from Google Patents.
US3907572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic photosensitive emulsion and color photographic material
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1974-01-25
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Granted: 1975-09-23
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Expires: 1994-01-25
Abstract
Abstract In color photographic photosensitive materials, coupler can be stably and finely dispersed in a silver halide color photographic emulsion by addition of a polymer which contains, as side chains in one molecule, carboxyl group, imidazole group and amide group or N-(1,1-dimethyl-3-oxobutyl)aminocarbonyl group beside said three groups.
Inventors
- 👤 Bunzo Ueda
- 👤 Sigeru Iguchi
- 👤 Tetsuo Yano
- 👤 Tamotu Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:48
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3882; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
IN A COLOR PHOTOGRAPHIC SILVER HALIDE EMULSION WHICH COMPRISES SILVER HALIDE AND A COUPLER, THE IMPROVEMENT OF ADDITIONALLY INCLUDING IN SAID EMULSION A POLYMER WHICH CONTAINS AS SIDE CHAIN GROUPS (A) CARBOXYL GROUPS, (B) IMIDAZOLE GROUPS, AND (C) AMIDE GROUPS OR SIDE CHAIN GROUPS (A), (B) AND (C) AND ALSO (D) N-(1,1-DIMETHYL-3-OXOBUTYL) AMINOCARBONYL GROUPS, THE PROPORTIONS OF SAID GROUPS BEING (A) 1-20 MOL % (B) 1-20 MOL %, (C) 10-98 MOL % AND (D) 0-50 MOL %, SAID POLYMER BEING A TERPOLYMER OF (1) ACRYLIC ACID, (2) ACRYLAMIDE AND (3) A VINYL IMIDAZOLE OR BEING A TETRAPOLYMER OF (1), (2), (3) AND ALSO (4) DIACETONE ACRYLAMIDE.
Claim 2
Dependent Claim
106 words
IN A COLOR PHOTOGRAPHIC SILVER HALIDE EMULSION WHICH COMPRISES SILVER HALIDE AND A COUPLER, THE IMPROVEMENT OF ADDITIONALLY INCLUDING IN SAID EMULSION A POLYMER WHICH CONTAINS AS SIDE CHAIN GROUPS (A) CARBOXYL GROUPS, (B) IMIDAZOLE GROUPS, AND (C) AMIDE GROUPS OR SIDE CHAIN GROUPS (A), (B) AND (C) AND ALSO (D) N-(1,1-DIMETHYL-3-OXOBUTYL) AMINOCARBONYL GROUPS, THE PROPORTIONS OF SAID GROUPS BEING (A) 1-20 MOL % (B) 1-20 MOL %, (C) 10-98 MOL % AND (D) 0-50 MOL %, SAID POLYMER BEING A TERPOLYMER OF (1) ACRYLIC ACID, (2) ACRYLAMIDE AND (3) A VINYL IMIDAZOLE OR BEING A TETRAPOLYMER OF (1), (2), (3) AND ALSO (4) DIACETONE ACRYLAMIDE.
Claim 3
Dependent Claim
19 words
A color photographic silver halide emulsion according to claim 1, wherein the polymer has a polymerization degree of 500-2000.
Claim 4
Dependent Claim
19 words
A color photographic silver halide emulsion according to claim 2, wherein the weight ratio of silver halide/polymer is 1/0.1-1/10.
Claim 5
Dependent Claim
18 words
A color photographic material which comprises a support and the emulsion as defined in claim 2 coated thereon.
Claim 6
Dependent Claim
13 words
An emulsion according to claim 1 wherein the vinyl imidazole has the formula
Claim 7
Dependent Claim
20 words
An emulsion according to claim 1 wherein the polymer is a terpolymer of acrylamide, 1-vinyl-2- Beta -hydroxyethyl-imidazole and acrylic acid.
Claim 8
Dependent Claim
31 words
An emulsion according to claim 1 wherein the polymer is a terpolymer prepared by hydrolyzing a copolymer of acrylamide and 1-vinyl-2-methylimidazole to form a terpolymer of acrylamide, 1-vinyl-2-methylimidazole and acrylic acid.
Claim 9
Dependent Claim
23 words
An emulsion according to claim 1 wherein the polymer is a tetrapolymer prepared by hydrolyzing a terpolymer of acrylamide, 1-vinyl-2-methylimidazole and diacetone acrylamide.
Claim 10
Dependent Claim
20 words
An emulsion according to claim 1 wherein the polymer is a tetrapolymer of acrylamide, 1-vinyl-2-ethylimidazole, diacetone acrylamide and acrylic acid.
Claim 11
Dependent Claim
15 words
A coupler dispersion which comprises a coupler and the polymer as defined in claim 1.
References Cited (Backward Citations)
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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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |