US2967972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron display device
Assignee: US Philips Corp
•
Filing: 1958-03-17
•
Granted: 1961-01-10
•
Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Haan Edward Fokko De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779748A
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US1754491A
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US2558019A
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US2543793A
Cited
US2527652A
Cited
US2698915A
Cited
US2869111A
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US2877371A
Cited
US2877376A
Cited
US2861206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |