US2724022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast-acting feedback amplifiers for high impedance sources
Assignee: Leeds and Northrup Co
•
Filing: 1950-02-07
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Granted: 1955-11-15
•
Expires: 1970-02-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert J Williams
- 👤 Clark William Russell
- 👤 Mcadam Will
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:20
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2622192A
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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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |