Patent US3614954A successfully refreshed from Google Patents.
Patent US3325706A successfully refreshed from Google Patents.
US3325706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transistor
Assignee: Westinghouse Electric Corp
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Filing: 1964-10-01
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Granted: 1967-06-13
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Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 Andrew P Kruper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D10/00; H10D30/00; H10D30/60; H10D48/34; H10D99/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A TRANSISTOR STRUCTURE COMPRISING: A BASE REGION; A COLLECTOR REGION FORMING A FIRST P-N JUNCTION WITH SAID BASE REGION; AN EMITTER REGION HAVING A CONFIGURATION OF A PLURALITY OF STRIPS FORMING AT LEAST A SECOND P-N JUNCTION WITH SAID BASE REGION; AT LEAST ONE OHMIC BASE CONTACT ON SAID BASE REGION CLOSELY SPACED FROM AT LEAST A MAJOR PORTION OF SAID AT LEAST A SECOND P-N JUNCTION, A BASE LEAD CONNECTED TO SAID AT LEAST ONE OHMIC BASE CONTACT; AN
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |