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US3435321A
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US
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Electrical converter circuit for supplying a load with variable frequency alternating current from an alternating current source of constant frequency
Assignee: BBC Brown Boveri AG Germany
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Filing: 1966-11-17
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Granted: 1969-03-25
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Expires: 1986-11-17
Abstract
No abstract record available.
Inventors
- 👤 Armand Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/06; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27; H02M5/271; H02P23/00; H02P23/14; H02P27/16; H02P27/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |