Patent US2906868A successfully refreshed from Google Patents.
US2906868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tube mixer
Assignee: GTE Sylvania Inc
•
Filing: 1956-02-27
•
Granted: 1959-09-29
•
Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel E George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
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)
US2409608A
Cited
FR1003492A
Cited
US2657305A
Cited
US2541843A
Cited
US2593113A
Cited
US2748268A
Cited
US2805333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |