US2543082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavity resonator device for production of high-speed electrons
Assignee: Individual
•
Filing: 1943-06-22
•
Granted: 1951-02-27
•
Expires: 1963-06-22
Abstract
No abstract record available.
Inventors
- 👤 David L Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:04
CPC Classifications
H; H05; H05H; H05H9/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2009457A
Cited
US2250698A
Cited
US2245670A
Cited
US2275480A
Cited
US2280824A
Cited
US2281935A
Cited
US2284751A
Cited
US2304186A
Cited
US2317140A
Cited
US2305883A
Cited
US2464349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |