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US2557780A
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Cavity resonator electrondischarge device
Assignee: Raytheon Co
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Filing: 1947-04-19
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Granted: 1951-06-19
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Expires: 1967-04-19
Abstract
No abstract record available.
Inventors
- 👤 William C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:49
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2429291A
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US2442118A
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US2435984A
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US2478534A
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US2414085A
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US2454337A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |