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Patent US3548289A successfully refreshed from Google Patents.
US3548289A
Expired / Lapsed
US
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Apparatus for supervising the current supplied to loads via antiparallel-connected thyristors
Assignee: Siemens AG
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Filing: 1969-04-14
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Granted: 1970-12-15
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Expires: 1989-04-14
Abstract
No abstract record available.
Inventors
- 👤 Manfred Liska
- 👤 Klaus Hubner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:09
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/122; H02H3/00; H02H3/12
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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |