Patent US2797353A successfully refreshed from Google Patents.
US2797353A
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Traveling wave type electron discharge devices
Assignee: AT&T Inc
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Filing: 1951-06-15
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Granted: 1957-06-25
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Expires: 1971-06-15
Abstract
No abstract record available.
Inventors
- 👤 Julius P Molnar
- 👤 Clarence R Moster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:38
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268196A
Cited
US2305884A
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US2602148A
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US2687490A
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US2685046A
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US2567674A
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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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |