US3445747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage power conversion assembly composed of a polyphase transformer combined with a plurality of sets of controlled rectifiers
Assignee: Electricite de France SA
•
Filing: 1966-04-11
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Granted: 1969-05-20
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 Pierre Gabriel Laurent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:38
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10; H02M7/068; H02M7/12; H02M7/145; H02M7/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE1111279B
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US3173061A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |