US2501003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-button tuning for signalseeking receivers
Assignee: COLONIAL RADIO Corp
•
Filing: 1945-04-13
•
Granted: 1950-03-21
•
Expires: 1965-04-13
Abstract
No abstract record available.
Inventors
- 👤 Marion J Pifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:05
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2056200A
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US2174634A
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US2262218A
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US2304871A
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US2275650A
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US2326737A
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US2394869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |