US3354397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage variable diode capacitance tunable circuit for television apparatus
Assignee: Standard Kollsman Industries Inc
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Filing: 1964-02-12
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Granted: 1967-11-21
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Expires: 1984-02-12
Abstract
No abstract record available.
Inventors
- 👤 Wittig Karl Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/16; H03J3/18; H03J3/185; H03J5/00; H03J5/24; H03J5/242; H03J5/244
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
IN A RADIO RECEIVER, AT LEAST ONE TURNABLE STAGE OPERATING WITH A VOLTAGE-CONTROLLED DIODE ELEMENT CIRCUIT CONNECTED TO AN INDUCTIVE ELEMENT FOR RESONANT TUNING TO A SELECTED FREQUENCY BY A CONTINUOUSLY VARIABLE REVERSE POLARITY VOLTAGE, THE IMPROVEMENT COMPRISING: AN ADDITIONAL VOLTAGE CONTROLLED DIODE ELEMENT, ADDITIONAL INDUCTANCE MEANS CIRCUIT CONNECTED THERETO, AND A FORWARDREVERSE VOLTAGE POLARITY SOURCE FOR SELECTIVELY SWITCHING SAID ADDITIONAL VOLTAGE-CONTROLLED DIODE ELEMENT BETWEEN A REVERSE AND FORWARD CONDUCTING CONDITION TO SELECTIVELY SWITCH THE OPERATING FREQUENCY OF THE TURNABLE STAGE BETWEEN PREDETERMINED FREQUENCY BANDS.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |