Patent US3102987A successfully refreshed from Google Patents.
US3102987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuner having variable capacitance diode and saturable inductor varied together by potentiometer tap movement and varied oppositely by battery drift
Assignee: Sony Corp
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Filing: 1961-09-07
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Granted: 1963-09-03
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Expires: 1981-09-07
Abstract
No abstract record available.
Inventors
- 👤 Yasuda Junichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:53
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A VARIABLE DEVICE COMPRISING A WOUND INDUCTANCE HAVING AN EXCITATION COIL THEREON, MAGNETIC MEANS BIASING SAID INDUCTANCE TO INCREASE THE INDUCTIVE REACTANCE OF SAID INDUCTANCE UPON AN INCREASE IN ENERGIZING CURRENT THROUGH SAID EXCITATION COIL, A SEMI-CONDUCTOR DEVICE WHOSE CAPACITANCE DECREASES WITH AN INCREASE IN VOLTAGE ACROSS SAID DEVICE, SAID SEMI-CONDUCTOR DEVICE HAVING ONE SIDE CONNECTED TO ONE SIDE OF SAID INDUCTANCE, A VARIABLE POWER SUPPLY, MEANS CONNECTING SAID POWER SUPPLY ACROSS SAID EXCITATION COIL OF SAID INDUCTANCE, AND MEANS CONNECTING SAID POWER SUPPLY ACROSS SAID SEMICONDUCTOR DEVICE.
Claim 2
Dependent Claim
88 words
A VARIABLE DEVICE COMPRISING A WOUND INDUCTANCE HAVING AN EXCITATION COIL THEREON, MAGNETIC MEANS BIASING SAID INDUCTANCE TO INCREASE THE INDUCTIVE REACTANCE OF SAID INDUCTANCE UPON AN INCREASE IN ENERGIZING CURRENT THROUGH SAID EXCITATION COIL, A SEMI-CONDUCTOR DEVICE WHOSE CAPACITANCE DECREASES WITH AN INCREASE IN VOLTAGE ACROSS SAID DEVICE, SAID SEMI-CONDUCTOR DEVICE HAVING ONE SIDE CONNECTED TO ONE SIDE OF SAID INDUCTANCE, A VARIABLE POWER SUPPLY, MEANS CONNECTING SAID POWER SUPPLY ACROSS SAID EXCITATION COIL OF SAID INDUCTANCE, AND MEANS CONNECTING SAID POWER SUPPLY ACROSS SAID SEMICONDUCTOR DEVICE.
References Cited (Backward Citations)
US3010015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |