Patent US3609412A successfully refreshed from Google Patents.
US3609412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated igfet signal converter circuit
Assignee: Panasonic Holdings Corp
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Filing: 1969-09-16
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Granted: 1971-09-28
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Expires: 1989-09-16
Abstract
Abstract An integrated circuit element comprising two insulated-gate field-effect transistors connected in parallel and another insulated-gate field-effect transistor connected in cascade thereto, which works stably as a converter, e.g. a local oscillator or a frequency converter element in a radio or television receiver and which can be easily designed because few outgoing electrode lead wires are necessary for integration.
Inventors
- 👤 Tomisaburo Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:33
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/12; H03D7/125; H10; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/83; H10D84/83125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
A circuit according to claim 2, wherein at least one of said first, second and third transistors is an insulated gate-type field-effect transistor comprising two gates.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |