Patent US2951970A successfully refreshed from Google Patents.
US2951970A
Expired / Lapsed
US
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Electroluminescent device
Assignee: GTE Sylvania Inc
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Filing: 1957-03-25
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Granted: 1960-09-06
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Matarese John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:51
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2136441A
Cited
US2201066A
Cited
US2670402A
Cited
US2749480A
Cited
US2698915A
Cited
US2818531A
Cited
US2774813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |