US2682606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Center tuning circuit for frequency modulation detectors
Assignee: RCA Corp
•
Filing: 1950-12-14
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Granted: 1954-06-29
•
Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Eugene O Keizer
- 👤 Marlin G Kroger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:33
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/12; H03G; H03G3/00; H03G3/20; H03G3/22; H03G3/26; H03G3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371397A
Cited
US2379688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |