Patent US2890374A successfully refreshed from Google Patents.
US2890374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tubes
Assignee: Thales SA
•
Filing: 1956-07-09
•
Granted: 1959-06-09
•
Expires: 1976-07-09
Abstract
No abstract record available.
Inventors
- 👤 Charles Daniel
- 👤 Gentner Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:40
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2190511A
Cited
US2289756A
Cited
US2820172A
Cited
US2768322A
Cited
GB730687A
Cited
US2800604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |