Patent US2510683A successfully refreshed from Google Patents.
US2510683A
Expired / Lapsed
US
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Negative feedback amplifier circuit
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-04-27
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Granted: 1950-06-06
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Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Carpentier Edmond Egbertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:23
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H03F3/00; H03F3/26; H03F3/28; H03F3/50; H03F3/52
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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |