Patent US4942115A successfully refreshed from Google Patents.
US4942115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally processable imaging element comprising an overcoat layer
Assignee: Eastman Kodak Co
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Filing: 1989-04-24
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Granted: 1990-07-17
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Expires: 2009-04-24
Abstract
Abstract A thermally processable imaging element having a hydrophobic imaging layer, an adhesion promoting polymer layer and an overcoat layer comprising poly(silicic acid) provides improved adhesion of the overcoat layer during thermal processing. The adhesion promoting layer comprises a terpolymer that promotes adhesion between the hydrophobic imaging layer and the overcoat layer without adversely affecting sensitometric properties of the imaging element. The adhesion promoting layer is useful in photothermographic and thermographic elements and processes.
Inventors
- 👤 Wojciech M. Przezdziecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:16
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/426; G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49872; G03C1/76; G03C1/7614; G03C1/91; G03C1/93; B41M5/423; B41M5/44; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A thermally processable imaging element comprising a support bearing a thermally processable hydrophobic imaging layer and, on the side of the imaging layer away from the support, an overcoat layer comprising poly(silicic acid) and a hydrophilic monomer or polymer, wherein the element comprises a polymeric adhesion promoting layer between the overcoat and the imaging layer.
Claim 2
Dependent Claim
55 words
A thermally processable imaging element comprising a support bearing a thermally processable hydrophobic imaging layer and, on the side of the imaging layer away from the support, an overcoat layer comprising poly(silicic acid) and a hydrophilic monomer or polymer, wherein the element comprises a polymeric adhesion promoting layer between the overcoat and the imaging layer.
Claim 3
Dependent Claim
16 words
A thermally processable imaging element as in claim 1 that is a photothermographic silver halide element.
Claim 4
Dependent Claim
25 words
A thermally processable imaging element as in claim 1 wherein the polymeric adhesion promoting layer comprises poly(2-propenenitrile co-1,1 -dichloroethene-co-2-propenoic acid) or poly(2-propenoic acid, methyl-ester-co-1,1dichloroethene-co-itaconic acid).
Claim 5
Dependent Claim
21 words
A thermally processable imaging element as in claim 1 wherein the polymeric adhesion promoting layer comprises poly(2-propenenitrile-co-1,1-dichloroethene-co-2-propenoic acid) and poly(vinyl alcohol).
Claim 6
Dependent Claim
18 words
A thermally processable imaging element as in claim 1 wherein the imaging layer comprises a poly(vinyl butyral) binder.
Claim 7
Dependent Claim
76 words
A thermally processable imaging element comprising a support bearing a hydrophobic photothermographic imaging layer comprising a poly(vinyl butyral) binder, photographic silver halide and an oxidation-reduction image forming combination comprising an organic silver salt oxidizing agent with a phenolic reducing agent, having, directly on the imaging layer, an adhesion promoting layer comprising poly(2-propene-nitrile-co-1,1-dichloroethene-co-propenoic acid), and having, directly on the adhesion promoting layer an overcoat layer comprising 50 to 90% poly(silicic acid) and 10 to 50% poly(vinyl alcohol).
Claim 8
Dependent Claim
76 words
A thermally processable imaging element comprising a support bearing a hydrophobic photothermographic imaging layer comprising a poly(vinyl butyral) binder, photographic silver halide and an oxidation-reduction image forming combination comprising an organic silver salt oxidizing agent with a phenolic reducing agent, having, directly on the imaging layer, an adhesion promoting layer comprising poly(2-propene-nitrile-co-1,1-dichloroethene-co-propenoic acid), and having, directly on the adhesion promoting layer an overcoat layer comprising 50 to 90% poly(silicic acid) and 10 to 50% poly(vinyl alcohol).
Claim 9
Dependent Claim
18 words
A thermally processable imaging element as in claim 6 wherein the adhesion promoting layer also comprises poly(vinyl alcohol).
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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) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |