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Patent US3209289A successfully refreshed from Google Patents.
US3209289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave tuning device
Assignee: Individual
•
Filing: 1962-12-26
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Granted: 1965-09-28
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Golden
- 👤 Jr Paul E Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:52
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
APPARATUS FOR VARYING THE RESONANT FREQUENCY OF A CAVITY RESONATOR COMPRISING SEMICONDUCTOR RECTIFIER MEANS, A BIAS VOLTAGE SOURCE, FIRST COAXIAL CABLE MEANS CONNECTING SAID BIAS VOLTAGE SOURCE TO SAID SEMICONDUCTOR RECTIFIER FOR APPLYING A VARIABLE REVERSE BIAS THERETO, CAPACITOR MEANS CONNECTED BETWEEN THE INNER CONDUCTOR AND THE OUTER CONDUCTOR OF SAID FIRST COAXIAL CABLE MEANS, SECOND COAXIAL CABLE PROBE MEANS CONNECTED TO SAID SEMICONDUCTOR RESONATOR AND EXTENDING INTO THE CAVITY OF SAID CAVITY RESONATOR COUPLING SAID SEMICONDUCTOR RECTIFIER TO SAID CAVITY RESONATOR, THE REACTANCE OF SAID SEMICONDUCTOR RECTIFIER BEING A FUNCTION OF SAID REVERSE BIAS VOLTAGE, WHEREBY A VARIATION IN THE REACTANCE OF SAID SEMICONDUCTOR RECTIFIER CHANGES THE RESONANT FREQUENCY OF SAID CAVITY RESONATOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |