Patent US3664839A successfully refreshed from Google Patents.
US3664839A
Expired / Lapsed
US
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Multiple scintillator layers on photographic elements
Assignee: Eastman Kodak Co
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Filing: 1969-09-16
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Granted: 1972-05-23
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Expires: 1989-09-16
Abstract
Abstract PHOTOGRAPHIC ELEMENTS CONTAINING MULTIPLE SCINTILLATOR LAYERS, WHEREIN ONE OF THE LAYERS IS A FINE-PARTICLE-SIZE SCINTILLATOR LAYER COMPRISING PARTICLE SIZES OF ABOUT 0.5 TO ABOUT 2.0 MICRONS, ARE FOUND TO BE VERY USEFUL IN ELECTRON-BEAM RECORDING AND PLAYBACK. THE COARSE-PARTICLE-SIZE LAYER FACILITTES EASY ALIGNMENT OF THE ELECTRON BEAM AND IS GENERALLY REMOVED AFTER THE RECORDING OPERATION. THE FINE-GRAIN LAYER IS RETAINED INTACT WITH THE IMAGE RECORD FOR READ-OUT OF THE RECORDED INFORMATION.
Inventors
- 👤 Evan Thomas Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:34
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; G; G01; G01T; G01T1/00; G01T1/02; G01T1/08; G01T1/16; G01T1/20; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
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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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |