US2844713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superheterodyne receiver with off-tune squelch circuit for automatic frequency control
Assignee: David Bogen & Co Inc
•
Filing: 1955-03-01
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Granted: 1958-07-22
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Expires: 1975-03-01
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Zuckerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:50
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121736A
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US2135949A
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US2172456A
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US2331821A
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US2513786A
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US2567286A
Cited
US2576552A
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US2691097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |