Patent US5904129A successfully refreshed from Google Patents.
Patent US3515955A successfully refreshed from Google Patents.
US3515955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor arrangement
Assignee: SEMIKRON G fur GLEICHRICHTELBA
•
Filing: 1967-10-10
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Granted: 1970-06-02
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Expires: 1987-10-10
Abstract
No abstract record available.
Inventors
- 👤 Claus Butenschon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:19
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/60; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W76/10; H10W76/12; H10W76/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA691931A
Cited
US3047781A
Cited
US2956160A
Cited
GB878590A
Cited
US3226603A
Cited
US3274458A
Cited
US3401317A
Cited
US3401315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |