Patent US3371281A successfully refreshed from Google Patents.
US3371281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation receiver combining frequency feedback and synchronous detection
Assignee: General Electric Co
•
Filing: 1963-10-24
•
Granted: 1968-02-27
•
Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Noble R Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:33
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/24; H03D3/241; H03D3/242
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2777055A
Cited
US3001068A
Cited
US2924706A
Cited
US3069625A
Cited
US2989622A
Cited
US3207995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |