US2783373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superheaterodyne receiver using resistance-capacitance tuning in local oscillator and radio frequency stage
Assignee: Individual
•
Filing: 1953-10-05
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Granted: 1957-02-26
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Expires: 1973-10-05
Abstract
No abstract record available.
Inventors
- 👤 Conrad J Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/20; H03B5/22; H03J; H03J3/00; H03J3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |