US3152294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unipolar diffusion transistor
Assignee: Siemens and Halske AG
•
Filing: 1959-11-24
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Granted: 1964-10-06
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Expires: 1979-11-24
Abstract
No abstract record available.
Inventors
- 👤 Siebertz Karl
- 👤 Wiesner Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/80; H03; H03F; H03F99/00; H10D48/00; H10D48/01; H10D48/30; H10D48/32; H10D48/36; H10D62/00; H10D62/01; H10D62/10; H10D64/00; H10D99/00; H10P; H10P32/00; H10P95/00; H10P95/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A UNIPOLAR TRANSISTOR COMPRISING A CONTROL ZONE FORMED BY A SEMICONDUCTOR BODY OF PREDETERMINED CONDUCTIVITY TYPE AND RELATIVELY LOW RESISTANCE, A FURTHER RELATIVELY THIN ZONE OF A CONDUCTIVITY TYPE OPPOSITE TO THAT OF SAID CONTROL ZONE AND HAVING A RELATIVELY HIGH RESISTANCE DIFFUSED INTO SAID CONTROL ZONE, AND AN ELECTRODE CONNECTED WITH EACH END OF SAID FURTHER ZONE.
Claim 2
Dependent Claim
58 words
A UNIPOLAR TRANSISTOR COMPRISING A CONTROL ZONE FORMED BY A SEMICONDUCTOR BODY OF PREDETERMINED CONDUCTIVITY TYPE AND RELATIVELY LOW RESISTANCE, A FURTHER RELATIVELY THIN ZONE OF A CONDUCTIVITY TYPE OPPOSITE TO THAT OF SAID CONTROL ZONE AND HAVING A RELATIVELY HIGH RESISTANCE DIFFUSED INTO SAID CONTROL ZONE, AND AN ELECTRODE CONNECTED WITH EACH END OF SAID FURTHER ZONE.
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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |