US3543045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for connecting and disconnecting converter station between transmission lines
Assignee: ABB Norden Holding AB
•
Filing: 1968-07-29
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Granted: 1970-11-24
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Expires: 1988-07-29
Abstract
No abstract record available.
Inventors
- 👤 Gustav Bertil Hammarlund
- 👤 Gustav Heine Martensson
- 👤 Erich Uhlmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:48
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/36; H02H; H02H7/00; H02H7/26; H02H7/266; H02H7/268; Y; Y02; Y02E; Y02E60/00; Y02E60/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3275838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |