US2878377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation receiver hiss-responsive squelch circuit made inefective by excess deviation audio peaks
Assignee: Allen B du Mont Laboratories Inc
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Filing: 1955-05-31
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Granted: 1959-03-17
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Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Jr William Vernon Hargreaves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:38
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H03G3/26; H03G3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2247085A
Cited
US2372934A
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US2420518A
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US2400948A
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US2589711A
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US2770721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |