US2960622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tubes
Assignee: International Standard Electric Corp
•
Filing: 1958-03-18
•
Granted: 1960-11-15
•
Expires: 1978-03-18
Abstract
No abstract record available.
Inventors
- 👤 Betty Charles Edward
- 👤 Evans Alfred
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)
GB699893A
Cited
US2827588A
Cited
US2768322A
Cited
GB761850A
Cited
GB734479A
Cited
US2895071A
Cited
US2797360A
Cited
US2834915A
Cited
FR1128756A
Cited
US2890374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |