US2497831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device employing cavity resonators
Assignee: RCA Corp
•
Filing: 1945-08-22
•
Granted: 1950-02-14
•
Expires: 1965-08-22
Abstract
No abstract record available.
Inventors
- 👤 Vore Henry B De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:14
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587; H01J23/00; H01J23/16; H01J23/18; H01J23/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2406370A
Cited
CH215600A
Cited
US2284405A
Cited
US2348986A
Cited
US2415253A
Cited
US2408409A
Cited
US2450023A
Cited
US2418469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |