Patent US5225419A successfully refreshed from Google Patents.
Patent USRE27045E successfully refreshed from Google Patents.
USRE27045E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor with limited area base-collector junction
Assignee: —
•
Filing: 1969-01-15
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Granted: 1971-02-02
•
Expires: 1989-01-15
Abstract
Abstract A TRANSISTOR DEVICE IS DISCLOSED WHEREIN ITS COLLECTOR REGION FORMS A JUNCTION OF LIMITED EXTENT WITH THE BASE REGION AND AN INTRINSIC OR HIGH RESISTIVITY REGION OF THE SAME CONDUCTIVITY TYPE AS THE COLLECTOR REGION EXTENDS FROM THE EXTREMITY OF THE JUNCTION TO THE SURFACE OF THE DEVICE. THE EMITTER IS LOCATED WITHIN THE BASE REGION AND IN SPACED ALIGNMENT WITH THE JUNCTION OF LIMITED EXTENT.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:37
CPC Classifications
H; H10; H10D; H10D10/00; H10D10/40; H10D10/441; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |