US3474303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor element having separated cathode zones
Assignee: SEMIKRON G fur GLEICHRICHTELBA
•
Filing: 1966-09-07
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Granted: 1969-10-21
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Expires: 1986-09-07
Abstract
No abstract record available.
Inventors
- 👤 Edgar Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:13
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; H10D; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2831787A
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US2837704A
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US3210621A
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US3160800A
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GB954534A
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US3213339A
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US3309585A
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US3356862A
Cited
US3381183A
Cited
US3355636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |