US2961360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnets having one easy direction of magnetization
Assignee: General Electric Co
•
Filing: 1958-12-01
•
Granted: 1960-11-22
•
Expires: 1978-12-01
Abstract
No abstract record available.
Inventors
- 👤 James S Kouvel
- 👤 Jr Charles D Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:53
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/0009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE PROCESS OF PRODUCING A PERMANENT MAGNET HAVING ONE EASY DIRECTION OF MAHNETIZATION AT TEMPERATURES BELOW ABOUT 80*K., THE STEPS COMPRISING PREPARING A BODY COMPOSED OF AN ALLOY SELECTED FROM THE GROUP CONSISTING OF (A) ALLOYS CONTAINING FROM ABOUT 20 TO 45 WEIGHT PERCENT MANGANESE, BALANCE A METAL FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT, AND COMBINATIONS THEREOF, OTHER THAN IRON-MANGANESE BINARY ALLOYS AND (B) ALLOYS CONTAINING FROM ABOUT 75 TO 85 WEIGHT PERCENT IRON BALANCE SUBSTANTIALLY ALL ALUMINUM, COOLING THE ALLOY BODY TO A TEMPERATURE BELOW ABOUT 70*K.. AND SUBJECTING THE BODY TO A MAGNETIC FIELD DURING COOLING TO ALIGN THE MAGNETIC MOMENTS OF THE FERROMAGNETIC REGIONS AND DEVELOP THE ONE EASY DIRECTION OF MAGNETIZATION WITHIN THE BODY.
Claim 2
Dependent Claim
121 words
IN THE PROCESS OF PRODUCING A PERMANENT MAGNET HAVING ONE EASY DIRECTION OF MAHNETIZATION AT TEMPERATURES BELOW ABOUT 80*K., THE STEPS COMPRISING PREPARING A BODY COMPOSED OF AN ALLOY SELECTED FROM THE GROUP CONSISTING OF (A) ALLOYS CONTAINING FROM ABOUT 20 TO 45 WEIGHT PERCENT MANGANESE, BALANCE A METAL FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT, AND COMBINATIONS THEREOF, OTHER THAN IRON-MANGANESE BINARY ALLOYS AND (B) ALLOYS CONTAINING FROM ABOUT 75 TO 85 WEIGHT PERCENT IRON BALANCE SUBSTANTIALLY ALL ALUMINUM, COOLING THE ALLOY BODY TO A TEMPERATURE BELOW ABOUT 70*K.. AND SUBJECTING THE BODY TO A MAGNETIC FIELD DURING COOLING TO ALIGN THE MAGNETIC MOMENTS OF THE FERROMAGNETIC REGIONS AND DEVELOP THE ONE EASY DIRECTION OF MAGNETIZATION WITHIN THE BODY.
References Cited (Backward Citations)
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Cited
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US2295082A
Cited
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Cited
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Cited
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |