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US3494791A
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Process for the production of a controllable semiconductor element with a pnpn structure with short-circuits in the emitter zone
Assignee: BBC Brown Boveri AG Germany
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Filing: 1967-08-29
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Granted: 1970-02-10
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 Edouard Eugster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:27
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; C; C23; C23F; C23F1/00; H10D; H10D99/00; H10P; H10P50/00; H10P50/60; H10P50/61; H10P50/613; H10P50/64; H10P50/642; H10P50/69; H10P50/691
Claims Analysis
Total Claims: 0
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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) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |