US3657140A
Expired / Lapsed
US
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Cerium activated solid solution yttrium gallium oxide phosphor
Assignee: EDWARD F GIBBONS
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Filing: 1970-05-26
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Granted: 1972-04-18
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Expires: 1990-05-26
Abstract
Abstract A SOLID SOLUTION OF YTTRIUM ALUMINUM OXIDE AND YTTRIUM GALLIUM OXIDE WITH A SMALL AMOUNT OF CERIUM ION EMITS BRIGHT YELLOW LIGHT WHEN EXCITED BY CATHODE RAYS. THE PHOSPHOR IS EASILY MANUFACTURED IN THE FORM OF A FINE UNIFORMLY DIVIDED PWDER THAT HAS A HIGH RESOLUTION AND A DECAY TIME OF LESS THAN ABOUT 70 NANOSECONDS.
Inventors
- 👤 Edward F Gibbons
- 👤 Douglas E Smith
- 👤 Tseng Y Tien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7774
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |