Patent US3562610A successfully refreshed from Google Patents.
US3562610A
Expired / Lapsed
US
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Controlled rectifier with improved switching characteristics
Assignee: Westinghouse Electric Corp
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Filing: 1969-07-01
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Granted: 1971-02-09
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Expires: 1989-07-01
Abstract
Abstract This is a continuation of U.S. Pat. No. 641,367 filed May 25, 1967 and now abandoned. This invention relates to a gate controlled PNPN semiconductor device having turnoff capability, and more particularly to a turnoff thyristor having both low current gain characteristics and high reverse gate to cathode emitter voltage characteristics. In this device an emitter region is formed in a base region by diffusion and gate contacts are alloyed through the emitter region to the base region.
Inventors
- 👤 Thomas G Stehney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:53
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/20; H10D64/27; H10D64/291; H10D18/00; H10D18/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2861018A
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US3044147A
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US2988677A
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US3239728A
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US3280386A
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US3362858A
Cited
US3331000A
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US3337782A
Cited
US3356862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |