US4480024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial X-ray photothermographic system
Assignee: Eastman Kodak Co
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Filing: 1983-10-21
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Granted: 1984-10-30
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Expires: 2003-10-21
Abstract
Abstract Photothermographic systems have not been useful in combination with X-ray purposes because of low speed, poor resolution and poor contrast. A particularly designed photothermographic element in combination with a rare-earth intensifying screen provides a high quality, fast, high resolution photothermographic radiographic system.
Inventors
- 👤 Thomas D. Lyons
- 👤 Gregory J. McCarney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:23
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C5/17; G03C1/00; G03C1/494; G03C1/498; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
An industrial X-ray imaging system comprising (a) a cassette (b) at least one X-ray intensifying screen with rare-earth phosphor particles having an average diameter of less than 6 microns on an interior surface of said cassette (c) a light sensitive material adjacent said intensifying screen, wherein said light-sensitive material is characterized by being a photothermographic emulsion comprising a long-chain fatty carboxylic acid, a layer of silver salt of a long-chain fatty carboxylic acid, silver halide, an organic reducing agent for silver, and a binder on a visually homogeneous, white, translucent substrate, the silver salt being present in in a molar ratio of 1.5/1 to 6.2/1 with respect to said acid.
Claim 2
Dependent Claim
110 words
An industrial X-ray imaging system comprising (a) a cassette (b) at least one X-ray intensifying screen with rare-earth phosphor particles having an average diameter of less than 6 microns on an interior surface of said cassette (c) a light sensitive material adjacent said intensifying screen, wherein said light-sensitive material is characterized by being a photothermographic emulsion comprising a long-chain fatty carboxylic acid, a layer of silver salt of a long-chain fatty carboxylic acid, silver halide, an organic reducing agent for silver, and a binder on a visually homogeneous, white, translucent substrate, the silver salt being present in in a molar ratio of 1.5/1 to 6.2/1 with respect to said acid.
Claim 3
Dependent Claim
15 words
The system of claim 1 wherein said acid has from 10 to 30 carbon atoms.
Claim 4
Dependent Claim
19 words
The system of claim 1, wherein the acid of the silver salt has from 10 to 30 carbon atoms.
Claim 5
Dependent Claim
22 words
The system of claim 1 wherein the acid and the acid of the silver salt have from 10 to 30 carbon atoms.
Claim 6
Dependent Claim
27 words
The system of claim 1 wherein said substrate comprises a polyester film loaded with oxide particles and the opacity of the substrate is between 80 and 99%.
Claim 7
Dependent Claim
27 words
The system of claim 4 wherein said substrate comprises a polyester film loaded with oxide particles and the opacity of the substrate is between 90 and 99%.
Claim 8
Dependent Claim
18 words
The system of claim 1 wherein said translucent substrate contains particulate matter and/or vesicles to provide the translucency.
References Cited (Backward Citations)
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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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |