US3053981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-gain frequency modulation tuner
Assignee: Security First National Bank
•
Filing: 1959-07-06
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Granted: 1962-09-11
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Expires: 1979-07-06
Abstract
No abstract record available.
Inventors
- 👤 Wheeler M Turner
- 👤 Leonard H Chabot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:16
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/001; H03D3/003; H03D3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2075503A
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US2273110A
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US2272401A
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US2502154A
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US2497841A
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US2897352A
Cited
US2869080A
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US2936428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |