US3609094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ytterbium-activated strontium phosphate phosphors
Assignee: GTE Sylvania Inc
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Filing: 1968-10-15
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Granted: 1971-09-28
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Expires: 1988-10-15
Abstract
Abstract Compounds of the ytterbium-activated strontium phosphate are novel and useful blue-emitting phosphors under cathode-ray and Xray excitation.
Inventors
- 👤 Francis N Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7709; C09K11/771
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3025423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |