US4692401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions and elements containing sensitizing dye in the form of host crystals
Assignee: Eastman Kodak Co
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Filing: 1986-08-21
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Granted: 1987-09-08
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Expires: 2006-08-21
Abstract
Abstract A photographic emulsion is disclosed containing grains comprised of a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium. The sensitizing dye is present in the form of host crystals, and the grains are in conductive contact with the host dye crystals. A photographic element containing the emulsion is also disclosed.
Inventors
- 👤 Gary L. House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
48 words
A photographic emulsion comprising grains containing a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium, characterized in that said sensitizing dye is present in the form of host crystals and said grains are in conductive contact with said host dye crystals.
Claim 2
Dependent Claim
48 words
A photographic emulsion comprising grains containing a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium, characterized in that said sensitizing dye is present in the form of host crystals and said grains are in conductive contact with said host dye crystals.
Claim 3
Dependent Claim
15 words
A photographic emulsion according to claim 1, wherein said dispersing medium is a hydrophilic colloid.
Claim 4
Dependent Claim
14 words
A photographic emulsion according to claim 1, wherein said silver salt is silver halide.
Claim 5
Dependent Claim
16 words
A photographic emulsion according to claim 3, wherein said silver halide is comprised of silver chloride.
Claim 6
Dependent Claim
15 words
A photographic emulsion according to claim 1 wherein said sensitizing dye is a methine dye.
Claim 7
Dependent Claim
17 words
A photographic emulsion according to claim 5 wherein said sensitizing dye is a cyanine or merocyanine dye.
Claim 8
Dependent Claim
15 words
A photogrphic element containing an emulsion according to any one of claims 1 through 6.
Claim 9
Dependent Claim
63 words
A photographic element comprising a film support and, coated on said film support, at least one photographic emulsion comprising grains containing a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium, characterized in that said sensitizing dye is present in the form of host crystals and said grains are in conductive contact with said host dye crystals.
Claim 10
Dependent Claim
63 words
A photographic element comprising a film support and, coated on said film support, at least one photographic emulsion comprising grains containing a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium, characterized in that said sensitizing dye is present in the form of host crystals and said grains are in conductive contact with said host dye crystals.
Claim 11
Dependent Claim
29 words
A photographic element according to claim 8, wherein said photographic element contains blue, green, and red recording emulsion layers and said one emulsion is a blue recording emulsion layer.
Claim 12
Dependent Claim
29 words
A photographic element according to claim 8, wherein said photographic element contains blue, green, and red recording emulsion layers and said one emulsion is a green recording emulsion layer.
Claim 13
Dependent Claim
29 words
A photographic element according to claim 8, wherein said photographic element contains blue, green, and red recording emulsion layers and said one emulsion is a red recording emulsion layer.
Claim 14
Dependent Claim
68 words
A radiographic element comprising a support having first and second major faces and, coated on each of said major faces, a photographic emulsion comprising grains containing a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium, characterized in that said sensitizing dye is present in the form of host crystals and said grains are in conductive contact with said host dye crystals.
Claim 15
Dependent Claim
68 words
A radiographic element comprising a support having first and second major faces and, coated on each of said major faces, a photographic emulsion comprising grains containing a silver salt capable of forming a latent image, a sensitizing dye, and a dispersing medium, characterized in that said sensitizing dye is present in the form of host crystals and said grains are in conductive contact with said host dye crystals.
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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |