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Patent US3424692A successfully refreshed from Google Patents.
US3424692A
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Method for preparing vanadate phosphors
Assignee: GTE Sylvania Inc
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Filing: 1966-04-22
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Granted: 1969-01-28
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Sam Z Toma
- 👤 James E Mathers
- 👤 Felix F Mikus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:30
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/67; C09K11/69
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |