Patent US2890384A successfully refreshed from Google Patents.
US2890384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave electronic devices
Assignee: Raytheon Co
•
Filing: 1953-09-24
•
Granted: 1959-06-09
•
Expires: 1973-09-24
Abstract
No abstract record available.
Inventors
- 👤 Edward C Dench
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:08
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/005; H01J23/16; H01J23/24; H01J23/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2537824A
Cited
US2673306A
Cited
US2678407A
Cited
US2708236A
Cited
US2622158A
Cited
US2746036A
Cited
US2745984A
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 |