US3597610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intensification screen for radiographic film
Assignee: Eastman Kodak Co
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Filing: 1968-04-25
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Granted: 1971-08-03
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Expires: 1988-04-25
Abstract
Abstract A layer comprising particles of a low melting point metal alloy of lead, bismuth, tin and cadmium and a binder is provided as an intensification screen. Good intensification without fog is obtained using particles of alloys, such as Wood metal, which melt lower than 80* C.
Inventors
- 👤 Raymond Marius Augustin Bayol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/08; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
A radiographic film comprising a support, at least one light-sensitive silver halide emulsion layer, and an intensification screen layer above said silver halide emulsion layer, said intensification screen layer comprising a binder and particles of an alloy of lead, bismuth, tin and cadmium having a melting point of less than 95*C.
Claim 2
Dependent Claim
16 words
A radiographic film according to claim 2 wherein said intensification layer is removable from said film.
Claim 3
Dependent Claim
15 words
A radiographic film according to claim 2 wherein said intensification layer comprises a water-softenable binder.
Claim 4
Dependent Claim
22 words
A radiographic film according to claim 2 wherein said intensification layer is secured to said emulsion layer by a water-soluble adhesive layer.
Claim 5
Dependent Claim
33 words
A radiographic film according to claim 2 wherein said intensification screen layer comprises from about 25 to about 95 percent by weight of said alloy particles based on the weight of the layer.
Claim 6
Dependent Claim
22 words
A radiographic film according to claim 6 wherein said alloy particles have an average particle size of from 1 to 12 microns.
Claim 7
Dependent Claim
16 words
A radiographic film according to claim 7 wherein the binder of said intensification layer comprises gelatin.
Claim 8
Dependent Claim
28 words
A radiographic film according to claim 8 wherein the alloy is provided in the intensification layer in an amount of from 0.1 to 10 grams per square decimeter.
Claim 9
Dependent Claim
23 words
A radiographic film according to claim 9 wherein said alloy has the following composition: Lead25 weight percentBismuth50 weight percentTin12.5 weight percentCadmium12.5 weight percent.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |