US3549553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing halophosphate phosphor of plate-like particle shape
Assignee: Philips North America LLC
•
Filing: 1968-02-19
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Granted: 1970-12-22
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Expires: 1988-02-19
Abstract
No abstract record available.
Inventors
- 👤 Anselm Wachtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:22
CPC Classifications
C; 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)
US3242369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |