US2922068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tube helix to coaxial line transition means
Assignee: Unisys Corp
•
Filing: 1958-06-03
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Granted: 1960-01-19
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Expires: 1978-06-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:29
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |