US2520989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier automatic gain control circuit
Assignee: Unisys Corp
•
Filing: 1944-06-14
•
Granted: 1950-09-05
•
Expires: 1964-06-14
Abstract
No abstract record available.
Inventors
- 👤 Jefferson R Wilkerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:57
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2046141A
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US2222759A
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US2073486A
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US2135599A
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US2200049A
Cited
US2227598A
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US2189549A
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US2146091A
Cited
US2225046A
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US2203004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |