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US3002090A
Expired / Lapsed
US
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Automatic-gain-control system
Assignee: Hazeltine Research Inc
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Filing: 1958-08-27
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Granted: 1961-09-26
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Expires: 1978-08-27
Abstract
No abstract record available.
Inventors
- 👤 Charles J Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:28
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H04; H04N; H04N5/00; H04N5/44; H04N5/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19857E
Cited
US2041150A
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US2069809A
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US2128996A
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GB705368A
Cited
US2739189A
Cited
US2789164A
Cited
US2773945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |