US2818545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saturable core reactor system
Assignee: ABB Norden Holding AB
•
Filing: 1952-09-20
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Granted: 1957-12-31
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Expires: 1972-09-20
Abstract
No abstract record available.
Inventors
- 👤 Lamm Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016; H; H01; H01F; H01F29/00; H01F29/14; H01F29/143; H03; H03F; H03F9/00; H03F9/04; H03K; H03K3/00; H03K3/02; H03K3/45; H01F3/00; H01F3/10; H01F2003/106
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |