US2578407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cast alnico magnets
Assignee: General Electric Co
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Filing: 1948-01-10
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Granted: 1951-12-11
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Expires: 1968-01-10
Abstract
No abstract record available.
Inventors
- 👤 Dolph G P Ebeling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:29
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; Y; Y10; Y10S; Y10S148/00; Y10S148/074
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
THE METHOD OF MANUFACTURING A MAGNETICALLY ANISOTROPIC CAST PERMANENT MAGNET WHICH COMPRISES FORMING A MELT OF A FERROUS ALLOY CONTAINING ABOUT 16-30% COBALT, 12-20% NICKEL, 611% ALUMINUM AND THE REMAINDER PRINCIPALLY IRON, CASTING SAID MELT IN THE FORM OF A BODY AND WHILE PREVENTING TO A SUBSTANTIAL EXTENT THE LOSS OF HEAT FROM THE SIDES OF THE MOLTEN BODY OF ALLOY EFFECTING THE SOLIDIFICATION THEREOF BY EXTRACTING A MAJOR PORTION OF THE HEAT OF SOLIDIFICATION OF SAID ALLOY FROM ONLY ONE END OF THE CAST MOLTEN ALLOY BY MEANS OF A METAL CHILL IN DIRECT CONTACT WITH SAID END OF THE MOLTEN ALLOY, SAID
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) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |