US3588668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for cycloconverters
Assignee: Individual
•
Filing: 1968-08-16
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Granted: 1971-06-28
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Expires: 1988-08-16
Abstract
Abstract A BLOCKING DEVICE PREVENTS THE SIMULTANEOUS OPERATION OF TWO RECTIFYING GROUPS OF THE CYCLOCONVERTER. A PILOT DEVICE FURNISHES FROM A POLYPHASE SUPPLY NETWORK A PILOT NETWORK WHICH IS PREFECTLY IN PHASE WITH THE SUPPLY NETWORK. A LOGIC CONTACT DEVICE DELIVERS TO THE CONTROL ELECTRODES OF THE THYRISTORS OF EACH RECTIFYING GROUP WHICH MUST BE CONDUCTIVE PULSES THROUGHOUT THE CONDUCTION TIME THIS OR EACH OF THE RECTIFYING GROUPS.
Inventors
- 👤 Francois Cova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:42
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27; H02M5/271
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |