US2916653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron emissive electrode
Assignee: Duro Test Corp
•
Filing: 1957-04-01
•
Granted: 1959-12-08
•
Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 Michel E Macksoud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/52; H01J61/523; H01J61/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2071973A
Cited
US2177703A
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US2249672A
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US2232780A
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US2304412A
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US2686274A
Cited
US2670451A
Cited
US2687489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |