US2672586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
On-load tap changer for transformers
Assignee: ABB Norden Holding AB
•
Filing: 1951-10-04
•
Granted: 1954-03-16
•
Expires: 1971-10-04
Abstract
No abstract record available.
Inventors
- 👤 Olsson Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:47
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/32; H01H3/40; H01H2003/405; H01H9/00; H01H9/0005; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19884
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2325936A
Cited
US2551943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |