Patent US2845070A successfully refreshed from Google Patents.
US3436672A
Expired / Lapsed
US
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High input impedance amplifier circuit
Assignee: United States Department of the Navy
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Filing: 1966-03-08
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Granted: 1969-04-01
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Expires: 1986-03-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur D Delagrange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3083; H03F3/3086; H03F3/3089; H03F3/34; H03F3/343; H03F3/345; H03F3/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3187267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |