Patent US2492996A successfully refreshed from Google Patents.
US2492996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable high-frequency cavity resonator
Assignee: Unisys Corp
•
Filing: 1945-08-25
•
Granted: 1950-01-03
•
Expires: 1965-08-25
Abstract
No abstract record available.
Inventors
- 👤 Robert O Haxby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:30
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE21361E
Cited
USRE22982E
Cited
US2280824A
Cited
US2304186A
Cited
US2403782A
Cited
US2356414A
Cited
US2391016A
Cited
US2408234A
Cited
US2408238A
Cited
US2452056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |