Patent US3398349A successfully refreshed from Google Patents.
US3398349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encased high voltage electrical converter of the semiconductor type
Assignee: Westinghouse Electric Corp
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Filing: 1965-10-20
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Granted: 1968-08-20
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul Evans
- 👤 Francis D Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/088; H10; H10W; H10W40/00; H10W40/40; H10W40/47; H10W42/00; H10W90/00; Y; Y10; Y10S; Y10S257/00; Y10S257/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123760A
Cited
US2931966A
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US2984773A
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US3173061A
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US3241034A
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US3242412A
Cited
US3234451A
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US3248636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |