US2558104A
Expired / Lapsed
US
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Procedure for making nickel-iron alloys having rectangular hysteresis loops
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1949-02-23
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Granted: 1951-06-26
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Charles A Scharschu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:27
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D1/00; C21D1/78; C22; C22F; C22F1/00; C22F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF PRODUCING MAGNETIC MATERIAL CONSISTING ESSENTIALLY OF NICKEL-IRON ALLOY CONTAINING FROM ABOUT 45% TO ABOUT 55% NICKEL, FROM A TRACE TO NOT MORE THAN 0.35% SILICON, FROM A TRACE UP TO 0.50% MANGANESE, CARBON ABOUT 0.025%, WITH THE REMAINDER SUBSTANTIALLY ALL IRON EXCEPT FOR USUAL IMPURITIES IN COMMON AMOUNTS AND CHARACTERIZED BY A RECTANGULAR HYSTERESIS LOOP WHICH CONSISTS IN MELTING RAW MATERIALS IN AN ELECTRIC FURNACE OF THE CONVENTIONAL ARC TYPE AND REFINING THE SAME IN SUCH FURNACE TO THE EXTENT OF REMOVING SUBSTANTIALLY ALL OXIDIZABLE IMPURITIES THEREFROM AND OF REDUCING THE CARBON CONTENT THEREOF TO NOT MORE THAN 0.030%, REMOVING THE SLAG FROM THE MELT, ADDING A NEW SLAG, COMPLETELY DEOXIDIZING THE MELT BY ADDING THERETO AN ACTIVE DEOXIDIZING AGENT IN
Claim 2
Independent Claim
124 words
A METHOD OF PRODUCING MAGNETIC MATERIAL CONSISTING ESSENTIALLY OF NICKEL-IRON ALLOY CONTAINING FROM ABOUT 45% TO ABOUT 55% NICKEL, FROM A TRACE TO NOT MORE THAN 0.35% SILICON, FROM A TRACE UP TO 0.50% MANGANESE, CARBON ABOUT 0.025%, WITH THE REMAINDER SUBSTANTIALLY ALL IRON EXCEPT FOR USUAL IMPURITIES IN COMMON AMOUNTS AND CHARACTERIZED BY A RECTANGULAR HYSTERESIS LOOP WHICH CONSISTS IN MELTING RAW MATERIALS IN AN ELECTRIC FURNACE OF THE CONVENTIONAL ARC TYPE AND REFINING THE SAME IN SUCH FURNACE TO THE EXTENT OF REMOVING SUBSTANTIALLY ALL OXIDIZABLE IMPURITIES THEREFROM AND OF REDUCING THE CARBON CONTENT THEREOF TO NOT MORE THAN 0.030%, REMOVING THE SLAG FROM THE MELT, ADDING A NEW SLAG, COMPLETELY DEOXIDIZING THE MELT BY ADDING THERETO AN ACTIVE DEOXIDIZING AGENT IN
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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |