US2828440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave electron tube
Assignee: RCA Corp
•
Filing: 1950-06-22
•
Granted: 1958-03-25
•
Expires: 1970-06-22
Abstract
No abstract record available.
Inventors
- 👤 Wellesley J Dodds
- 👤 Rolf W Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; H01J23/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2064469A
Cited
US2122538A
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US2511407A
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US2578434A
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US2672572A
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US2531972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |