US2843790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave amplifier
Assignee: AT&T Inc
•
Filing: 1951-12-14
•
Granted: 1958-07-15
•
Expires: 1971-12-14
Abstract
No abstract record available.
Inventors
- 👤 Cassius C Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:20
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2623193A
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FR992048A
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US2584597A
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US2595698A
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US2585582A
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US2567674A
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US2588832A
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US2608668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |