US3368980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing yttrium oxide phosphors
Assignee: Verizon Laboratories Inc
•
Filing: 1964-12-24
•
Granted: 1968-02-13
•
Expires: 1984-12-24
Abstract
No abstract record available.
Inventors
- 👤 Frank J Avella
- 👤 Frank C Palilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:26
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7783; C09K11/7784; C09K11/7787
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2546239A
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US2729606A
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US2758094A
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US2982740A
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US3017365A
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US3147226A
Cited
US3250722A
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US3294701A
Cited
US3157602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |