US3718866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-degenerative parametric amplifier
Assignee: United States Department of the Navy
•
Filing: 1972-03-22
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Granted: 1973-02-27
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Expires: 1992-03-22
Abstract
Abstract A LOW NOISE, COOLED OR UNCOOLED PARAMETRIC AMPLIFIER ESPECIALLY SUITED FOR RADIO ASTRONOMY RECEIVERS. THE AMPLIFIER EMPLOYERS A NOVEL DIODE MOUNT, A PUMP, AN IDLING FILTER, AND AN IMPEDANCE TRANSFORMER FOR A SINGLE ENDED AMPLIFIER SO AS TO PRODUCE LARGE BANDWIDTH AND A WIDE TUNING RANGE.
Inventors
- 👤 J Edrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:51
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |