US3597365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor
Assignee: British Lighting Industries Ltd
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Filing: 1968-02-28
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Granted: 1971-08-03
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Expires: 1988-02-28
Abstract
Abstract A PHOSPHOR IS PRODUCED BY HEATING TOGETHER TRIVALENT CERIUM OXIDE AND ALUMINUM OXIDE TO PRODUCE CEROUS ALUMINUM OXIDE HAVING THE B-ALUMINA CRYSTAL STRUCTURE. FOR THE PRODUCTION OF A CEROUS MANGANESE ALUMINUM OXIDE PHOSPHOR, DIVALENT MANGANESE OXIDE MAY BE INCLUDED IN THE INITIAL MIXTURE OR MAY BE HEATED IN ADMIXTURE WITH THE CEROUS ALUMINUM OXIDE. IN ALL CASES ANY ONE OR MORE OF THE OXIDES MAY BE REPLACED AT LEAST PARTIALLY BY A COMPOUND WHICH YIELDS THE OXIDE UNDER THE HEATING CONDITIONS.
Inventors
- 👤 Harold Francis Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7721
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) | 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 |