US3832245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing an object of silicon steel having low sulphur content
Assignee: ABB Norden Holding AB
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Filing: 1972-05-30
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Granted: 1974-08-27
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Expires: 1992-05-30
Abstract
Abstract IN MANUFACTURING OBJECTS OF SILICON STEEL SUCH AS STRIP, SHEET AND RODS FOR ELECTRICAL EQUIPMENT, THERE IS APPLIED TO THE SURFACE OF THE MATERIAL PARTICLES OF A HYDROXIDE OF AN ALKALINE EARTH METAL OR ALUMINIUM AND/OR A CARBONATE OF AN ALKALINE EARTH METAL AND/OR OXIDE OF ALKALINE EARTH METAL OR ALUMINIUM IN COMBINATION WITH A VANADIUM COMPOUND. THE OBJECT IS THEN SUBJECTED TO A HEATING AT A TEMPERATURE OF AT LEAST 850*C., AND PREFERABLY 10001300*C.
Inventors
- 👤 C Akerblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
C; C23; C23C; C23C24/00; B; B21; B21B; B21B3/00; B21B3/02; C21; C21D; C21D1/00; C21D1/78; C21D8/00; C21D8/12; C23C26/00
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |