US2897294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transverse magnetic traveling wave amplifiers
Assignee: Unisys Corp
•
Filing: 1955-03-17
•
Granted: 1959-07-28
•
Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 Daniel M Lipkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:05
CPC Classifications
H; H01; H01P; H01P9/00; H01P9/02; H03; H03F; H03F7/00; H03F7/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1794717A
Cited
US2543843A
Cited
US2650350A
Cited
US2619537A
Cited
US2752559A
Cited
US2723353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |