US2344731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detected frequency modulated wave amplifier
Assignee: RCA Corp
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Filing: 1940-11-13
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Granted: 1944-03-21
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Expires: 1960-11-13
Abstract
No abstract record available.
Inventors
- 👤 John A Rankin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:16
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/02; H03G3/14; H03G3/16; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/08; H03F; H03F3/00; H03F3/26; H03F3/28; H03G3/20; H03G3/22; H03G3/26; H03G3/28
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) | 1947-03-21 | 1947-09-20 | 1948-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-21 | 1951-09-20 | 1952-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-21 | 1955-09-20 | 1956-03-21 | $7700.00 | Window Closed / Lapsed |