US3499165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission system for high voltage direct current
Assignee: ABB Norden Holding AB
•
Filing: 1967-06-22
•
Granted: 1970-03-03
•
Expires: 1987-06-22
Abstract
No abstract record available.
Inventors
- 👤 Vjekoslav Madzarevic
- 👤 Hans Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:56
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/36; Y; Y02; Y02E; Y02E60/00; Y02E60/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2757321A
Cited
US2909709A
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US2942154A
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US3036257A
Cited
US3253188A
Cited
US3315146A
Cited
US3283212A
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US3331990A
Cited
US3309571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |