Patent US3440501A successfully refreshed from Google Patents.
US3440501A
Expired / Lapsed
US
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Double-triggering semiconductor controlled rectifier
Assignee: General Electric Co
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Filing: 1967-02-02
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Granted: 1969-04-22
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Expires: 1987-02-02
Abstract
No abstract record available.
Inventors
- 👤 Dante E Piccone
- 👤 Istvan Somos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/13; H10D62/141; H10D62/148; H10D99/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
OUR IDEA IS TO FURTHER INCREASE THE TURN-ON DI/DT CAPABILITY NOF SUCH A DEVICE BY PROVIDING A SECOND AUXILIARY REGION IN ONE OF ITS END LAYERS AT A LOCATION REMOTE FROM THE ORIGINAL AUXILIARY REGION (BOTH AUXILIARY REGIONS BEING FREE OF THE MAIN ELECTRODE THAT IS CONNECTED TO THE ADJACENT MAIN REGION OF THAT END LAYER), AND BY CONDUCITIVITY INTERCONNECTING THESE REGIONS IN SUCH A MANNER THAT THE SECOND STEP OF THE TURN-ON PROCESS TAKES PLACE IN THE VICINITY OF THE ADDITIONAL AUXILIARY REGION WHICH IS RELATIVELY FAR REMOVED FROM THE INITIAL PINPOINT AREA OF CONDUCTION.
References Cited (Backward Citations)
US3263139A
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US3344323A
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US3317746A
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US3381186A
Cited
FR1452718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |