US3479609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuation circuit using a tuned amplifier whose q is varied by shunting resistors
Assignee: United States Department of the Army
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Filing: 1966-06-13
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Granted: 1969-11-18
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Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph N Castelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:49
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735902A
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US1718138A
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US2858424A
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US3234480A
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US3177350A
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US3193775A
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US3370181A
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US3369173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |