US3501412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing dysprosium-activated rare-earth metal vanadate phosphor
Assignee: Philips North America LLC
•
Filing: 1967-06-29
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Granted: 1970-03-17
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Expires: 1987-06-29
Abstract
No abstract record available.
Inventors
- 👤 Richard C Ropp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7776
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA779860A
Cited
US2921912A
Cited
US3152085A
Cited
US3416019A
Cited
US3368980A
Cited
US3322682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |