US2476654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkaline earth fluorophosphate phosphors by coprecipitation
Assignee: General Electric Co
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Filing: 1945-05-05
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Granted: 1949-07-19
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Expires: 1965-05-05
Abstract
No abstract record available.
Inventors
- 👤 Herman C Froelich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:00
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/22; C09; C09K; C09K11/00; C09K11/08; C09K11/0855; C09K11/0861; C09K11/0866
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2238026A
Cited
GB512154A
Cited
US2226407A
Cited
US2187022A
Cited
US2302770A
Cited
US2289997A
Cited
US2306567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |