Patent US3172048A successfully refreshed from Google Patents.
US3172048A
Expired / Lapsed
US
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Parametric amplifier with plural parallel nonlinear reactors and idler circuits
Assignee: Telefunken Patentverwertungs GmbH
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Filing: 1961-07-31
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Granted: 1965-03-02
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Ohnsorge Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:03
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PARAMETRIC AMPLIFIER, COMPRISING, IN COMBINATION: A SIGNAL CIRCUIT; A PLURALITY OF ADDITIONAL CIRCUITS EACH BEING CONNECTED IN PARALLEL WITH SAID SIGNAL CIRCUIT AND EACH INCLUDING A NONLINEAR REACTANCE AND A RESONANT IDLING CIRCUIT; AND MEANS FOR FEEDING AT LEAST ONE PUMP FREQUENCY TO SAID CIRCUITS.
Claim 2
Dependent Claim
46 words
A PARAMETRIC AMPLIFIER, COMPRISING, IN COMBINATION: A SIGNAL CIRCUIT; A PLURALITY OF ADDITIONAL CIRCUITS EACH BEING CONNECTED IN PARALLEL WITH SAID SIGNAL CIRCUIT AND EACH INCLUDING A NONLINEAR REACTANCE AND A RESONANT IDLING CIRCUIT; AND MEANS FOR FEEDING AT LEAST ONE PUMP FREQUENCY TO SAID CIRCUITS.
References Cited (Backward Citations)
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Cited
US3045189A
Cited
DE1081515B
Cited
US3040267A
Cited
FR1238790A
Cited
US3076149A
Cited
US3070751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |