US2247213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra short wave receiver
Assignee: RCA Corp
•
Filing: 1940-03-13
•
Granted: 1941-06-24
•
Expires: 1960-03-13
Abstract
No abstract record available.
Inventors
- 👤 Trevor Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:54
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/10; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/202; H03D; H03D9/00; H03D9/06; H03D9/065; H03F; H03F3/00; H03F3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-06-23 | 1944-12-23 | 1945-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-23 | 1948-12-23 | 1949-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-23 | 1952-12-23 | 1953-06-24 | $7700.00 | Window Closed / Lapsed |