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US2765447A
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Tuning device
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1951-11-06
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Granted: 1956-10-02
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Expires: 1971-11-06
Abstract
No abstract record available.
Inventors
- 👤 Henry R Hesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:10
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2126541A
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US2262365A
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US2522370A
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US2543042A
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US2463417A
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US2482393A
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US2551228A
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US2627579A
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US2543560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |