US2456494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for the modulation of electrical oscillations
Assignee: Hartford National Bank and Trust Co
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Filing: 1947-02-11
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Granted: 1948-12-14
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Expires: 1967-02-11
Abstract
No abstract record available.
Inventors
- 👤 Ensink Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:00
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58; H01; H01F; H01F27/00; H01F27/24; H01F27/26; H01F27/263; H01F27/33; H01F30/00; H01F30/06; H01F30/10
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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |