US4409316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistively heatable photothermographic element with strippable layer
Assignee: Eastman Kodak Co
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Filing: 1982-02-26
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Granted: 1983-10-11
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Expires: 2002-02-26
Abstract
Abstract Photothermographic imaging elements are provided with strippable layers which have electrical conductivity in the range of 60 to 1,500 ohms/square. The elements may be exposed to radiation and then thermally developed by applying a voltage across the strippable layer which becomes resistively heated. After development, the strippable layer may be removed.
Inventors
- 👤 Jeanine I. Zeller-Pendrey
- 👤 Mark C. Skinner
- 👤 David A. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:03
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/262; G03C1/00; G03C1/76; G03C1/805
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
A photothermographic element comprising a support base having on one surface thereof a photothermographically imageable layer and adhered to the opposite surface of said support base a strippable layer having a resistance of between 60 and 1,500 ohms per square.
Claim 2
Dependent Claim
40 words
A photothermographic element comprising a support base having on one surface thereof a photothermographically imageable layer and adhered to the opposite surface of said support base a strippable layer having a resistance of between 60 and 1,500 ohms per square.
Claim 3
Dependent Claim
51 words
The element of claim 1 wherein said strippable layer comprises a first insulating layer having one side bonded to said opposite surface of said support base and a second layer which provides the resistnce of between 60 and 1500 ohms per square adhered to the other side of said first layer.
Claim 4
Dependent Claim
38 words
The element of claim 1 wherein said strippable layer comprises a polymeric resin filled with conductive material and said strippable layer may be removed by a force of 0.5 to 9 ounces per inch width of the layer.
Claim 5
Dependent Claim
21 words
The element of claim 3 wherein said conductive material is selected from the group consisting of carbon black, graphite, and metal.
Claim 6
Dependent Claim
12 words
The element of claim 3 wherein said conductive material comprises carbon black.
Claim 7
Dependent Claim
30 words
The element of claims 1, 2, or 5 wherein said photothermographic layer comprises silver halide, a silver source material and a reducing agent for silver ion in a polymeric binder.
Claim 8
Dependent Claim
34 words
The element of claims 1, 2 or 5 wherein said support base is a transparent polyethylene terephthalate polymeric resin layer and said strippable layer comprises a mixture of cellulose acetate and cellulose acetate propionate.
Claim 9
Dependent Claim
45 words
The element of claims 1, 2 or 5 wherein said photothermographic layer comprises silver halide, a silver source material, and a reducing agent for silver ion and said support base comprises a transparent polyethylene terephthalate polymeric resin and said strippable layer comprises a cellulose ester.
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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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |