US2789249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflex klystrons
Assignee: GTE Sylvania Inc
•
Filing: 1951-06-01
•
Granted: 1957-04-16
•
Expires: 1971-06-01
Abstract
No abstract record available.
Inventors
- 👤 Janis Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:07
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1564070A
Cited
US2259690A
Cited
US2429243A
Cited
US2411913A
Cited
US2468152A
Cited
US2460402A
Cited
US2518954A
Cited
US2540080A
Cited
US2695973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |