US2824220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio transmitter tuner
Assignee: AERONAUTICAL COMM EQUIPMENT IN
•
Filing: 1953-11-25
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Granted: 1958-02-18
•
Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 William H Epperson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:46
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/24; H03J5/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1535189A
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US1842781A
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US1985183A
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US2173902A
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US2101668A
Cited
US2270917A
Cited
US2606285A
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US2376667A
Cited
US2498340A
Cited
US2505511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |