US3211592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing permanent magnets having large coercive force
Assignee: RESEARCH INST FOR ELECTRIC AND MAGNETIC MATERIALS
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Filing: 1963-04-16
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Granted: 1965-10-12
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Expires: 1983-04-16
Abstract
No abstract record available.
Inventors
- 👤 Masumoto Hakaru
- 👤 Kobayashi Takeo
- 👤 Watanabe Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; C; C22; C22C; C22C19/00; C22C19/07; H01F1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF MANUFACTURING HIGH COERCIVE FORCE PERMANENT MAGNETS, COMPRISING HEATING AN ALLOY CONSISTING ESSENTIALLY OF ABOUT 75-90% COBALT AND ABOUT 25-10, ALUMINUM TO A TEMPERATURE ABOVE THE E+$ BINARY REGION, QUENCHING THE ALLOY TO A TEMPERATURE BELOW THE UPPER BOUNDARY OF THE E+$ BINARY REGION, HEATING THE ALLOY IN SAID BINARY REGION AT A TEMPERATURE SUFFICIENT TO PRECIPITATE FINE PARTICLES OF FERROMAGNETIC $ IN A MATRIX OF NONMAGNETIC E, AND MAGNETIZING THE PRODUCT THUS OBTAINED IN A STRONG MAGNETIC FIELD TO OBTAIN A PERMANENT MAGNETIC HAVING HIGH COERCIVE FORCE.
Claim 2
Independent Claim
90 words
A METHOD OF MANUFACTURING HIGH COERCIVE FORCE PERMANENT MAGNETS, COMPRISING HEATING AN ALLOY CONSISTING ESSENTIALLY OF ABOUT 75-90% COBALT AND ABOUT 25-10, ALUMINUM TO A TEMPERATURE ABOVE THE E+$ BINARY REGION, QUENCHING THE ALLOY TO A TEMPERATURE BELOW THE UPPER BOUNDARY OF THE E+$ BINARY REGION, HEATING THE ALLOY IN SAID BINARY REGION AT A TEMPERATURE SUFFICIENT TO PRECIPITATE FINE PARTICLES OF FERROMAGNETIC $ IN A MATRIX OF NONMAGNETIC E, AND MAGNETIZING THE PRODUCT THUS OBTAINED IN A STRONG MAGNETIC FIELD TO OBTAIN A PERMANENT MAGNETIC HAVING HIGH COERCIVE FORCE.
References Cited (Backward Citations)
GB342868A
Cited
US2082041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |