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US2645758A
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Electromagnetic device for amplitude-modulation of high-frequency oscillations
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-04-14
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Granted: 1953-07-14
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Expires: 1971-04-14
Abstract
No abstract record available.
Inventors
- 👤 Lindt Willem Jacobus Van De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:30
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/342; H01F1/344; H03; H03C; H03C7/00; H03C7/02; H03C7/022; H03L; H03L7/00; H03L7/26
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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |