US2204805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for forced commutation of current rectifiers or converters
Assignee: ABB Norden Holding AB
•
Filing: 1938-02-26
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Granted: 1940-06-18
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Expires: 1958-02-26
Abstract
No abstract record available.
Inventors
- 👤 Lamm Uno
- 👤 Karsberg Ake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/006; H02M1/00; H02M1/0061; H02M7/02; H02M7/04; H02M7/06; Y; Y02; Y02B; Y02B70/00; Y02B70/10
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) | 1943-06-18 | 1943-12-18 | 1944-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-18 | 1947-12-18 | 1948-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-18 | 1951-12-18 | 1952-06-18 | $7700.00 | Window Closed / Lapsed |