US2823332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave amplifier device
Assignee: AT&T Inc
•
Filing: 1951-06-08
•
Granted: 1958-02-11
•
Expires: 1971-06-08
Abstract
No abstract record available.
Inventors
- 👤 Robert C Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:03
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2367295A
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US2428612A
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US2508280A
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US2532545A
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US2566087A
Cited
US2541843A
Cited
US2687777A
Cited
US2531972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |