Patent US2474938A successfully refreshed from Google Patents.
US2474938A
Expired / Lapsed
US
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Cavity resonator electron discharge device
Assignee: Raytheon Co
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Filing: 1944-09-12
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Granted: 1949-07-05
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Expires: 1964-09-12
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Gorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:32
CPC Classifications
H; H05; H05H; H05H13/00; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2295315A
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US2289220A
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US2305883A
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US2247077A
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US2408236A
Cited
US2412772A
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US2414085A
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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) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |