US3173101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic two stage unipolar-bipolar semiconductor amplifier device
Assignee: Westinghouse Electric Corp
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Filing: 1961-02-15
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Granted: 1965-03-09
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 John P Stelmak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:25
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/345; H03F3/3455; H10; H10D; H10D84/00; H10D84/40; H10D84/401; H10P; H10P95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A MONOLITHIC UNIPOLAR-BIPOLAR SEMICONDUCTOR DEVICE COMPRISING A LAYER OF INTRINSIC MATERIAL HAVING A PLURALITY OF REGIONS OF IMPURITY CONCENTRATION THEREON TO FORM A UNIPOLAR AMPLIFIER ELEMENT HAVING SOURCE, GATE AND DRAIN REGIONS AND A BIPOLAR AMPLIFIER ELEMENT HAVING BASE, COLLECTOR AND EMITTER REGIONS, SAID LAYER OF INTRINSIC MATERIAL EXTENDING THROUGH AND JOINING SAID AMPLIFIER ELEMENTS INTO A UNITARY BODY WHILE SERVING SUB-
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |