US2919374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved traveling wave tube amplifier
Assignee: GTE Sylvania Inc
•
Filing: 1955-07-05
•
Granted: 1959-12-29
•
Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Richard I Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:54
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603772A
Cited
US2676246A
Cited
GB699893A
Cited
US2776374A
Cited
US2830271A
Cited
US2702370A
Cited
US2844753A
Cited
US2812470A
Cited
US2814779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |