Patent US2390214A successfully refreshed from Google Patents.
Patent US3284643A successfully refreshed from Google Patents.
US3284643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency, single junction, bipolar transistor
Assignee: Individual
•
Filing: 1964-01-06
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Granted: 1966-11-08
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Menoret
- 👤 Marc E Savelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:25
CPC Classifications
H; H10; H10D; H10D10/00; H10D30/00; H10D30/80; H10D62/00; H10D62/01; H10D62/10; H10D99/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A SINGLE JUNCTION BIPOLAR TRANSISTOR COMPRISING A CIRCULAR SEMICONDUCTOR WAFER BODY PROVIDED ON ONE SIDE THEREOF WI TH A COAXIAL CYLINDRICAL PROJECTION OF REDUCED CROSS SECTION, SAID BODY HAVING A FIRST CIRCULAR REGION IN CLUDING SAID PROJECTION OF A GIVEN TYPE OF CONDUCTIVITY SAID BODY HAVING A SECOND CIRCULAR REGION WHICH IS COAXIALLY INCLUDED IN THE SIDE OF SAID FIRST REGION OPPOSITE TO SAID PROJECTION AND WHICH IS OF THE OPPOSITE TYPE OF CONDUCTIVITY, A JUNCTION BETWEEN SAID FIRST AND SECOND REGIONS, AN EMITTER ELECTRODE IN OHMIC CONTACT WITH THE SAID SECOND REGION, A COLLECTOR ELECTRODE IN OHMIC CONTACT WITH THE FREE END OF SAID PROJECTION AND AN ANNULAR BASE ELECTRODE COAXIALLY SURROUNDING SAID PROJECTION IN SPACED RELATION THERETO AND BEING IN OHMIC CONTACT WITH SAID FIRST REGION.
Claim 2
Dependent Claim
128 words
A SINGLE JUNCTION BIPOLAR TRANSISTOR COMPRISING A CIRCULAR SEMICONDUCTOR WAFER BODY PROVIDED ON ONE SIDE THEREOF WI TH A COAXIAL CYLINDRICAL PROJECTION OF REDUCED CROSS SECTION, SAID BODY HAVING A FIRST CIRCULAR REGION IN CLUDING SAID PROJECTION OF A GIVEN TYPE OF CONDUCTIVITY SAID BODY HAVING A SECOND CIRCULAR REGION WHICH IS COAXIALLY INCLUDED IN THE SIDE OF SAID FIRST REGION OPPOSITE TO SAID PROJECTION AND WHICH IS OF THE OPPOSITE TYPE OF CONDUCTIVITY, A JUNCTION BETWEEN SAID FIRST AND SECOND REGIONS, AN EMITTER ELECTRODE IN OHMIC CONTACT WITH THE SAID SECOND REGION, A COLLECTOR ELECTRODE IN OHMIC CONTACT WITH THE FREE END OF SAID PROJECTION AND AN ANNULAR BASE ELECTRODE COAXIALLY SURROUNDING SAID PROJECTION IN SPACED RELATION THERETO AND BEING IN OHMIC CONTACT WITH SAID FIRST REGION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |