Patent US4477562A successfully refreshed from Google Patents.
US4477562A
Expired / Lapsed
US
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Dry strip antihalation layer for photothermographic film
Assignee: Eastman Kodak Co
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Filing: 1983-05-24
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Granted: 1984-10-16
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Expires: 2003-05-24
Abstract
Abstract A photothermographic element having a strippably-adhered, radiation-absorbing, antihalation layer is disclosed. The element comprises at least one imageable layer adhered to one surface of a support base, and an antihalation layer having a resistance greater than 1500 ohms per square, strippably adhered to any exposed surface of said element, said antihalation layer having a delaminating resistance in the range of 6 to 50 g/cm, a layer strength in g/cm greater than its delaminating resistance, and an optical density of at least 0.1.
Inventors
- 👤 Jeanine I. Zeller-Pendrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49872; G03C1/76; G03C1/825
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
A photothermographic element comprising a. at least one photosensitive layer, capable of being developed by heat after image-wise exposure to radiation in the range of 380 to 800 nm, adhered to one surface of a transparent polymeric support base, and b. a unitary antihalation layer having a resistance greater than 5000 ohms per square, adhered to any surface of said element and dry-strippable therefrom, said antihalation layer having a delaminating resistance in the range of 6 to 50 g/cm, a layer strength in g/cm greater than its delaminating resistance, and an optical density of at least 0.1.
Claim 2
Dependent Claim
97 words
A photothermographic element comprising a. at least one photosensitive layer, capable of being developed by heat after image-wise exposure to radiation in the range of 380 to 800 nm, adhered to one surface of a transparent polymeric support base, and b. a unitary antihalation layer having a resistance greater than 5000 ohms per square, adhered to any surface of said element and dry-strippable therefrom, said antihalation layer having a delaminating resistance in the range of 6 to 50 g/cm, a layer strength in g/cm greater than its delaminating resistance, and an optical density of at least 0.1.
Claim 3
Dependent Claim
19 words
The element according to claim 1 wherein said antihalation layer is adhered to the backside of said support base.
Claim 4
Dependent Claim
16 words
The element according to claim 1 wherein said antihalation layer is adhered to said imageable layer.
Claim 5
Dependent Claim
29 words
The element according to claim 1 wherein said antihalation layer comprises a resin selected from polyester, polyamide, polyolefin, polyvinylchloride, polyether, polycarbonate, gelatin, cellulose ester, polyvinyl acetate, or combinations thereof.
Claim 6
Dependent Claim
40 words
The element according to claim 1 wherein said antihalation layer comprises a resin selected from polyvinyl butyrals, polyvinyl alcohols, methyl methacrylate, ethyl methacrylate, ethyl methyl methacrylate, cellulose acetate, cellulose acetate ester, cellulose acetate propionate, cellulose acetate butyrate, or combinations thereof.
Claim 7
Dependent Claim
44 words
The element according to claim 1 wherein said support base and said antihalation layers comprise resins having limited natural affinity for each other selected from combinations of poly(ethyleneterephthalate) and a cellulose ester, a polyester and a polyamide, and a polyamide and a polyvinyl acetal.
Claim 8
Dependent Claim
20 words
The element according to claim 1 wherein said optical density is at least in the range of 0.3 to 2.0.
Claim 9
Dependent Claim
24 words
The element according to claim 4 wherein said antihalation material is selected from the group consisting of carbon black, graphite, titanium dioxide, and dyes.
Claim 10
Dependent Claim
21 words
The element according to claim 4 wherein said antihalation material comprises carbon black of average particle size up to 50 microns.
Claim 11
Dependent Claim
28 words
The element according to claim 1 wherein said photothermographic layer comprises silver halide, a silver source material and a reducing agent for silver ion in a polymeric binder.
Claim 12
Dependent Claim
22 words
The element according to claim 1 further comprising a chemically effective amount of at least one of a surfactant and a plasticizer.
Claim 13
Dependent Claim
37 words
The element according to claim 1 wherein said photosensitive layer is selected from layers containing (1) silver halide, (2) a diazonium salt, (3) dye-bleach, (4) an oxidizable leuco dye, (5) pH sensitive materials, or (6) photoinitiated couplers.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |