US4639412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistively heated photothermographic media on vesicular substrate
Assignee: Eastman Kodak Co
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Filing: 1986-06-13
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Granted: 1987-01-27
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Expires: 2006-06-13
Abstract
Abstract The use of a reflective white substrate comprising a polymeric film containing both vesicles and white pigment provides a good background layer for photothermographic emulsions which improves image properties.
Inventors
- 👤 Gary E. LaBelle
- 👤 David T. Ask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:45
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/494; G03C1/498; G03C1/49836; G03C1/49863; G03C1/76; G03C1/95
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
84 words
A photothermographic element comprising an opaque substrate having at least one photothermographic emulsion coated on one side of said substrate and a resistively heatable layer adhered to the other side of said substrate, said emulsion comprising silver halide in reactive association with a light-insensitive organic silver salt, a reducing agent for silver ion, and an organic film having at least 1% by volume of vesicles, at least 1% by weight of white pigment and an optical transmission density at least 1.5 to white light.
Claim 2
Dependent Claim
84 words
A photothermographic element comprising an opaque substrate having at least one photothermographic emulsion coated on one side of said substrate and a resistively heatable layer adhered to the other side of said substrate, said emulsion comprising silver halide in reactive association with a light-insensitive organic silver salt, a reducing agent for silver ion, and an organic film having at least 1% by volume of vesicles, at least 1% by weight of white pigment and an optical transmission density at least 1.5 to white light.
Claim 3
Dependent Claim
20 words
The element of claim 1 wherein said substrate has an optical transmission density to white light of at least 2.0.
Claim 4
Dependent Claim
16 words
The element of claim 1 wherein said substrate comprises 1 to 50% by volume of vesicles.
Claim 5
Dependent Claim
17 words
The element of claim 1 wherein said substrate comprises from 2 to 35% by volume of vesicles.
Claim 6
Dependent Claim
16 words
The element of claim 1 wherein said vesicles are from 0.01 to 20 microns in diameter.
Claim 7
Dependent Claim
16 words
The element of claim 3 wherein said vesicles are from 0.01 to 20 microns in diameter.
Claim 8
Dependent Claim
16 words
The element of claim 4 wherein said vesicles are from 0.01 to 20 microns in diameter.
Claim 9
Dependent Claim
17 words
The element of claim 1 wherein said pigment comprises 1 to 75% by weight of said substrate.
Claim 10
Dependent Claim
17 words
The element of claim 3 wherein said pigment comprises 1 to 75% by weight of said substrate.
Claim 11
Dependent Claim
17 words
The element of claim 4 wherein said pigment comprises 1 to 75% by weight of said substrate.
Claim 12
Dependent Claim
17 words
The element of claim 5 wherein said pigment comprises 1 to 75% by weight of said substrate.
Claim 13
Dependent Claim
17 words
The element of claim 7 wherein said pigment comprises 1 to 75% by weight of said substrate.
Claim 14
Dependent Claim
17 words
The element of claim 1 wherein said pigment comprises 2 to 50% by weight of said substrate.
Claim 15
Dependent Claim
17 words
The element of claim 3 wherein said pigment comprises 2 to 50% by weight of said substrate.
Claim 16
Dependent Claim
17 words
The element of claim 5 wherein said pigment comprises 2 to 50% by weight of said substrate.
Claim 17
Dependent Claim
17 words
The element of claim 7 wherein said pigment comprises 2 to 50% by weight of said substrate.
Claim 18
Dependent Claim
21 words
The element of claim 3 wherein said pigment is selected from the group consisting of titania, barium sulfate, and zinc oxide.
Claim 19
Dependent Claim
21 words
The element of claim 16 wherein said pigment is selected from the group consisting of titania, barium sulfate, and zinc oxide.
Claim 20
Dependent Claim
13 words
The element of claim 1 wherein said emulsion comprises a color photothermographic emulsion.
Claim 21
Dependent Claim
13 words
The element of claim 16 wherein said emulsion comprises a color photothermographic emulsion.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |