Patent US2935623A successfully refreshed from Google Patents.
US2935623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor switching device
Assignee: US Philips Corp
•
Filing: 1954-12-07
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Granted: 1960-05-03
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Expires: 1974-12-07
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Johannes Wilhel Marie
- 👤 Willems Ebertus
- 👤 Johannes Theodorus Anto Lottum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:25
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2614140A
Cited
US2763832A
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US2622213A
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US2676271A
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US2693568A
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US2802065A
Cited
US2812437A
Cited
US2767330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |