US3767589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bismuth activated gadolinium niobate phosphors
Assignee: GTE Sylvania Inc
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Filing: 1972-05-22
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Granted: 1973-10-23
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Expires: 1992-05-22
Abstract
Abstract COMPOUNDS OF BISMUTH-ACTIVATED GADONLINIUM NIOBATE ARE NOVEL AND USEFUL BLUE-EMITTING PHOSPHORS UNDER CATHODE RAY AND U.V. EXCITATION.
Inventors
- 👤 D Grisafe
- 👤 C Fritsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:25
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |