Patent US3996939A successfully refreshed from Google Patents.
Patent US3274463A successfully refreshed from Google Patents.
US3274463A
Expired / Lapsed
US
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Symmetrically switching integrated semiconductor devices
Assignee: ELECTRONIC CONTROLS CORP
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Filing: 1964-02-11
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Granted: 1966-09-20
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Expires: 1984-02-11
Abstract
No abstract record available.
Inventors
- 👤 Jearld L Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
H; H10; H10D; H10D10/00; H10D18/00; H10D84/00; H10D84/60; H10D84/645; H10D99/00; Y; Y10; Y10S; Y10S257/00; Y10S257/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A DUOJUNCTION TRANSISTOR COMPRISING A SEMICONDUCTOR BODY OF ONE-TYPE CONDUCTIVITY HAVING A REGION OF OPPOSITE-TYPE CONDUCTIVITY AT EACH END THEREOF FORMING A PN JUNCTION THEREWITH, A CONTACT FOR EACH REGION SHUNTING SUCH REGION TO THE BODY ALONG A PN JUNCTION, AN AREA OF OPPOSITE-TYPE CONDUCTIVITY ADJACENT TO EACH REGION PENETRATING A PORTION OF SAID BODY BETWEEN ITS END AND FORMING PN JUNCTIONS THEREWITH, EACH ARE BEING WITHIN A DIFFUSION LENGTH FOR MINORITY CARRIERS IN SAID BODY FROM THE REGION OF ITS ADJACENCY AND BEYOND SUCH DIFFUSION LENGTH FROM EACH OTHER, AND ELECTRICAL CONTACT TO EACH SAID AREA.
Claim 2
Dependent Claim
97 words
A DUOJUNCTION TRANSISTOR COMPRISING A SEMICONDUCTOR BODY OF ONE-TYPE CONDUCTIVITY HAVING A REGION OF OPPOSITE-TYPE CONDUCTIVITY AT EACH END THEREOF FORMING A PN JUNCTION THEREWITH, A CONTACT FOR EACH REGION SHUNTING SUCH REGION TO THE BODY ALONG A PN JUNCTION, AN AREA OF OPPOSITE-TYPE CONDUCTIVITY ADJACENT TO EACH REGION PENETRATING A PORTION OF SAID BODY BETWEEN ITS END AND FORMING PN JUNCTIONS THEREWITH, EACH ARE BEING WITHIN A DIFFUSION LENGTH FOR MINORITY CARRIERS IN SAID BODY FROM THE REGION OF ITS ADJACENCY AND BEYOND SUCH DIFFUSION LENGTH FROM EACH OTHER, AND ELECTRICAL CONTACT TO EACH SAID AREA.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |