US2806187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor rectifier device
Assignee: Westinghouse Electric Corp
•
Filing: 1955-11-08
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Granted: 1957-09-10
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Expires: 1975-11-08
Abstract
No abstract record available.
Inventors
- 👤 John L Boyer
- 👤 Willard S Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:26
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/611; H10W72/00; H10W90/00; H10W40/20; H10W40/231; H10W40/235; H10W40/237
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2745044A
Cited
US2759133A
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US2751528A
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US2744218A
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US2756374A
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US2752541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |