US3193605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for symmetrizing the load in electric three-phase arc furnaces
Assignee: ABB Norden Holding AB
•
Filing: 1962-01-15
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Granted: 1965-07-06
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Ludvig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:04
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/26; Y; Y02; Y02E; Y02E40/00; Y02E40/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
MEANS FOR SYMMETRIZING THE LOAD IN ELECTRIC THREEPHASE ARC FURNACES HAVING A MIDDLE ELECTRODE CARRYING THE CURRENT 12, AND TWO OUTER ELECTRODES CARRYING THE CURRENTS I1 AND I3, RESPECTIVELY FED FROM TRANSFORMER MEANS IN DELTACONNECTION COMPRISING A MIDDLE PHASE CARRYING THE CURRENT
Claim 2
Dependent Claim
42 words
MEANS FOR SYMMETRIZING THE LOAD IN ELECTRIC THREEPHASE ARC FURNACES HAVING A MIDDLE ELECTRODE CARRYING THE CURRENT 12, AND TWO OUTER ELECTRODES CARRYING THE CURRENTS I1 AND I3, RESPECTIVELY FED FROM TRANSFORMER MEANS IN DELTACONNECTION COMPRISING A MIDDLE PHASE CARRYING THE CURRENT
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |