US2716202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave amplifier electron discharge device
Assignee: AT&T Inc
•
Filing: 1950-06-20
•
Granted: 1955-08-23
•
Expires: 1970-06-20
Abstract
No abstract record available.
Inventors
- 👤 John B Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:51
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1739420A
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US1648458A
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US2145911A
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US2289756A
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FR934220A
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US2521760A
Cited
US2575383A
Cited
US2578434A
Cited
US2541843A
Cited
US2516944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |