US2567286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for automatic frequency correction
Assignee: Hartford National Bank and Trust Co
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Filing: 1947-12-02
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Granted: 1951-09-11
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Expires: 1967-12-02
Abstract
No abstract record available.
Inventors
- 👤 Hugenholtz Eduard Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/026; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |