US5356764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye image forming photographic elements
Assignee: Eastman Kodak Co
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Filing: 1993-06-01
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Granted: 1994-10-18
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Expires: 2013-06-01
Abstract
Abstract A color photographic element having a support bearing at least one radiation sensitive emulsion layer comprising dispersing medium and silver halide grains is disclosed. The emulsion layer is a tabular grain silver halide emulsion layer Wherein at least 50 percent of total grain projected area is accounted for by tabular grains (a) bounded by {100} major faces having adjacent edge ratios of less than 10, (b) each having an aspect ratio of at least 2, and (c) internally at their nucleation site, containing iodide and at least 50 mole percent chloride. The emulsion layer has in reactive association an image dye-forming compound and a compound that contains a photographically useful group and is capable of reacting with oxidized developing agent to thereby release such group. A process for preparing the radiation sensitive tabular grain silver halide emulsions is also described.
Inventors
- 👤 Richard P. Szajewski
- 👤 Gary L. House
- 👤 Thomas B. Brust
- 👤 Debra L. Hartsell
- 👤 Donald L. Black
- 👤 Anne E. Bohan
- 👤 James P. Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/0051; G03C1/035; G03C7/00; G03C7/30; G03C7/3022; G03C7/305; G03C2001/0055; G03C2200/00; G03C2200/03; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
142 words
A color photographic element comprised of a support and, coated on the support, at least one unit containing a radiation sensitive emulsion layer comprised of a dispersing medium and silver halide grains and, in reactive association with the emulsion layer, an image-dye forming compound, where (A) within at least one emulsion layer at least 50 percent of total grain projected area is accounted for by tabular grains (a) bounded by {100} major faces having adjacent edge ratios of less than 10, (b) each having an aspect ratio of at least 2, and (c) internally at their nucleation site containing iodide and at least 50 mole percent chloride and (B) in reactive association with said one emulsion layer, a development inhibitor releasing compound that contains a development inhibitor group and is capable of reacting with oxidized developing agent thereby to release such group.
Claim 2
Dependent Claim
142 words
A color photographic element comprised of a support and, coated on the support, at least one unit containing a radiation sensitive emulsion layer comprised of a dispersing medium and silver halide grains and, in reactive association with the emulsion layer, an image-dye forming compound, where (A) within at least one emulsion layer at least 50 percent of total grain projected area is accounted for by tabular grains (a) bounded by {100} major faces having adjacent edge ratios of less than 10, (b) each having an aspect ratio of at least 2, and (c) internally at their nucleation site containing iodide and at least 50 mole percent chloride and (B) in reactive association with said one emulsion layer, a development inhibitor releasing compound that contains a development inhibitor group and is capable of reacting with oxidized developing agent thereby to release such group.
Claim 3
Dependent Claim
17 words
A color photographic element according to claim 1 wherein the average aspect ratio is at least 5.
Claim 4
Dependent Claim
17 words
A color photographic element according to claim 1 wherein the average aspect ratio is greater than 8.
Claim 5
Dependent Claim
16 words
A color photographic element according to claim 1 wherein the edge ratios are less than 5.
Claim 6
Dependent Claim
16 words
A color photographic element according to claim 1 wherein the edge ratios are less than 2.
Claim 7
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the tabular grains have thicknesses of less than 0.3 μm.
Claim 8
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the tabular grains have thicknesses of less than 0.2 μm.
Claim 9
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the tabular grains have thicknesses of less than 0.06 μm.
Claim 10
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the tabular grains contain at least 70 mole percent chloride.
Claim 11
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the tabular grains contain at least 90 mole percent chloride.
Claim 12
Dependent Claim
16 words
A color photographic element according to claim 10 wherein the tabular grains are silver iodochloride grains.
Claim 13
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the compound that contains the development inhibitor is a coupler.
Claim 14
Dependent Claim
19 words
A color photographic element according to claim 1 wherein the development inhibitor is a mercaptotetrazole, mercaptooxadiazole or a mercaptothiadiazole.
Claim 15
Dependent Claim
18 words
A color photographic element according to claim 1 wherein the development inhibitor is a benzotriazole or a tetrazole.
Claim 16
Dependent Claim
28 words
A color photographic element according to claim 1 additionally comprised of a bleach accelerator, a development accelerator, a competing coupler, an electron transfer agent, or a bleach inhibitor.
Claim 17
Dependent Claim
17 words
A color photographic element according to claim 1 wherein the developing agent is a p-phenylenediamine developing agent.
Claim 18
Dependent Claim
15 words
A color photographic element according to claim 1 wherein said one emulsion layer is blue-sensitized.
Claim 19
Dependent Claim
61 words
A color photographic element according to claim 1 comprised of a red-sensitized unit containing at least one silver halide emulsion layer, a green-sensitized unit containing at least one silver halide emulsion layer and a blue-sensitized unit containing at least one silver halide emulsion layer, wherein at least one of these emulsion layers contains the tabular grains bounded by {100} major faces.
Claim 20
Dependent Claim
31 words
A color photographic element according to claim 18 wherein at least one of the silver halide emulsion layers that contains tabular silver halide grains bounded by {100} major faces is blue-sensitized.
Claim 21
Dependent Claim
31 words
A color photographic element according to claim 18 wherein at least one of the silver halide emulsion layers that contains tabular silver halide grains bounded by }100} major faces is red-sensitized.
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |