US2529668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device of cavity resonator type with reverse flow of electrons
Assignee: Westinghouse Electric Corp
•
Filing: 1944-09-12
•
Granted: 1950-11-14
•
Expires: 1964-09-12
Abstract
No abstract record available.
Inventors
- 👤 Wang Chao Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:54
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2190511A
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US2287845A
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US2375223A
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US2314794A
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US2278210A
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US2416303A
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US2391016A
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US2398162A
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US2414785A
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US2429243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |