US3634282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent compounds of cerium phosphates activated by terbium
Assignee: Bpifrance Financement SA
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Filing: 1969-09-25
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Granted: 1972-01-11
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Expires: 1989-09-25
Abstract
Abstract THIS INVENTION RELATES TO LUMINESCENT MATERIALS COMPRISING COMPUNDS OF RARE-EARTH ELEMENTS AND BELONGING TO THE CLASS OF ORTHOPHOSPHATES AND CONTAINING TERBIUM AS AN ACTIVATING ELEMENT. THE INVENTION ALSO INCLUDES A METHOD OF PREPARING THESE MATERIALS, AND FURTHER INCLUDES THEIR APPLICATIONS, MORE PARTICULARLY IN THE MANUFACTURE OF TELEVISION SCREENS, CATHODE RAY DEVICES, RADIATION DETECTORS AND OTHER DEVICES MAKING USE OF THEIR PROPERTIES OF FLUORESCENCE AND CATHODOLUMINESCENCE.
Inventors
- 👤 Jean-Pierre Denis
- 👤 Jean Loriers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:06
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7777; C09K11/7778; C09K11/7709; C09K11/771
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |