US2579654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron-discharge device for microwave amplification
Assignee: Raytheon Co
•
Filing: 1947-06-04
•
Granted: 1951-12-25
•
Expires: 1967-06-04
Abstract
No abstract record available.
Inventors
- 👤 Palmer P Derby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2233126A
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US2153728A
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US2272165A
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US2289756A
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US2241976A
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US2300052A
Cited
US2367295A
Cited
US2445771A
Cited
US2466922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |