US3244510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrical steel having superior magnetic properties
Assignee: Fuji Iron and Steel Co Ltd
•
Filing: 1963-05-16
•
Granted: 1966-04-05
•
Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Norman P Goss
- 👤 Watanabe Shozo
- 👤 Kumai Ko
- 👤 Tsuda Seizo
- 👤 Matsuoka Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:12
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/076; C22; C22C; C22C38/00; C22C38/02; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF PRODUCING LOW LOSS HIGH PERMEABILITY SILICON STEEL WHICH COMPRISES THE STEPS OF CHARGING AN IRON ALLOY INTO A FURNACE, REDUCING THE CARBON CONTENT IN THE FURNACE, TAPPING THE FURNACE AND CAUSING A STREAM OF MOLTEN METAL TO ISSUE INTO A LADLE TO FORM A MASS OF MOLTEN STEEL IN THE LADLE, AND DIRECTING A STREAM OF FLUX PARTICLES AGAINST THE MOLTEN IRON STREAM AT ITS POINT OF ENTRY INTO THE LADLE AT THE MOLTEN METAL LEVEL, SAID FLUX PARTICLES COMPRISING SILICON AND A DESULPHURIZATION AGENT WHICH REACT WITH THE STEEL TO FORM A SLAG HIGHLY FLUID AT MOLTEN IRON TEMPERATURE.
Claim 2
Independent Claim
103 words
THE METHOD OF PRODUCING LOW LOSS HIGH PERMEABILITY SILICON STEEL WHICH COMPRISES THE STEPS OF CHARGING AN IRON ALLOY INTO A FURNACE, REDUCING THE CARBON CONTENT IN THE FURNACE, TAPPING THE FURNACE AND CAUSING A STREAM OF MOLTEN METAL TO ISSUE INTO A LADLE TO FORM A MASS OF MOLTEN STEEL IN THE LADLE, AND DIRECTING A STREAM OF FLUX PARTICLES AGAINST THE MOLTEN IRON STREAM AT ITS POINT OF ENTRY INTO THE LADLE AT THE MOLTEN METAL LEVEL, SAID FLUX PARTICLES COMPRISING SILICON AND A DESULPHURIZATION AGENT WHICH REACT WITH THE STEEL TO FORM A SLAG HIGHLY FLUID AT MOLTEN IRON TEMPERATURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |