US2953701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed-off diode with electron emitting anode
Assignee: High Voltage Engineering Corp
•
Filing: 1957-09-05
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Granted: 1960-09-20
•
Expires: 1977-09-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Gale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:54
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1864591A
Cited
US2348814A
Cited
US2284389A
Cited
US2283639A
Cited
US2476060A
Cited
US2608664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |