Patent US2543082A successfully refreshed from Google Patents.
US2543082A
Expired / Lapsed
US
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Cavity resonator device for production of high-speed electrons
Assignee: Individual
•
Filing: 1943-06-22
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Granted: 1951-02-27
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Expires: 1963-06-22
Abstract
No abstract record available.
Inventors
- 👤 David L Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:29
CPC Classifications
H; H05; H05H; H05H9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2250698A
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US2245670A
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US2275480A
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US2280824A
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US2281935A
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US2284751A
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US2304186A
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US2317140A
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US2305883A
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US2464349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |