US3144618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel diode crystal controlled oscillator
Assignee: Westinghouse Electric Corp
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Filing: 1961-01-16
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Granted: 1964-08-11
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Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 Wesley N Jones
- 👤 Beser Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:28
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/02; H03B7/06; H03B7/08; H03B5/00; H03B5/30; H03B5/32; H03B5/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A FREQUENCY CONTROLLED OSCILLATOR CIRCUIT COMPRISING A TUNNEL DIODE HAVING A NEGATIVE CONDUCTANCE REGION AND A CAPACITANCE REACTANCE THEREIN, BIAS MEANS OPERATIVE TO BIAS SAID TUNNEL DIODE IN SAID NEGATIVE CONDUCTANCE REGION, AND AN IMPEDANCE MEMBER HAVING AN INDUCTIVE REACTANCE CONNECTED IN SERIES WITH SAID TUNNEL DIODE TO FORM A TUNED CIRCUIT INCLUDING THE CAPACITIVE REACTANCE OF SAID TUNNEL DIODE, SAID TUNED CIRCUIT HAVING A PREDETERMINED SERIS RESONANT FREQUENCY, AND A PIEZOELECTRIC CRYSTAL HAVING A PREDETERMINED RESONANT FREQUENCY AND BEING CONNECTED ACROSS SAID IMPEDANCE MEMBER TO SUSTAIN OSCILLATION AT A FREQUENCY BETWEEN SAID SERIES RESONANT FREQUENCY OF SAID TUNED CIRCUIT AND SAID PREDETERMINED RESONANT FREQUENCY OF SAID CRYSTAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |