US2524281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical automatic tuning unit
Assignee: COLONIAL RADIO Corp
•
Filing: 1942-10-29
•
Granted: 1950-10-03
•
Expires: 1962-10-29
Abstract
No abstract record available.
Inventors
- 👤 William S Winfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:55
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/30
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |