US2493423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device of the magnetron type
Assignee: RCA Corp
•
Filing: 1944-05-29
•
Granted: 1950-01-03
•
Expires: 1964-05-29
Abstract
No abstract record available.
Inventors
- 👤 John M Spooner
- 👤 Lloyd P Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/04; H01J23/05; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587; Y; Y10; Y10S; Y10S29/00; Y10S29/062
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1757233A
Cited
US1970532A
Cited
US2009369A
Cited
US2163157A
Cited
GB509102A
Cited
USRE22724E
Cited
US2400770A
Cited
US2409038A
Cited
US2450763A
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 |