US3350240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing magnetically anisotropic single-crystal magnets
Assignee: Proterial Ltd
•
Filing: 1964-05-28
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Granted: 1967-10-31
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Higuchi Akira
- 👤 Miyamoto Toshinobu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:07
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; C; C22; C22C; C22C19/00; C22C19/07; C22C38/00; C22C38/10; C22C38/105; C30; C30B; C30B1/00; C30B1/02; C30B29/00; C30B29/10; C30B29/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF PRODUCING A MAGNETICALLY ANISOTROPIC SINGLE-CRYSTAL FERROALLOY MAGNET HAVING A COMPOSITION CONSISTING OF 6-10% AL, 12-20% NI, 20-42% CO, .0-7% CU, LESS THAN 6% TI AND THE BALANCE FE, COMPRISING SUBJECTING A POLYCRYSTAL ORIENTED MAGNET OF SAID COMPOSITION TO A SERIES OF MORE THAN TWO HEAT-TREATMENT CYCLES, EACH SAID COMPRISING HEATING SAID MAGNET TO 1250-1280*C. AT A HEATING RATE OF 5-20*C. PER MINUTE AND THEN SLOWLY COOLING TO ABOUT 900*C., AND THEN HEAT-TREATIG THE RESULTANT SINGLE-CRYSTAL MAGNET IN A MAGNETIC FIELD AND AGING SAID MAGNET.
Claim 2
Independent Claim
87 words
A METHOD OF PRODUCING A MAGNETICALLY ANISOTROPIC SINGLE-CRYSTAL FERROALLOY MAGNET HAVING A COMPOSITION CONSISTING OF 6-10% AL, 12-20% NI, 20-42% CO, .0-7% CU, LESS THAN 6% TI AND THE BALANCE FE, COMPRISING SUBJECTING A POLYCRYSTAL ORIENTED MAGNET OF SAID COMPOSITION TO A SERIES OF MORE THAN TWO HEAT-TREATMENT CYCLES, EACH SAID COMPRISING HEATING SAID MAGNET TO 1250-1280*C. AT A HEATING RATE OF 5-20*C. PER MINUTE AND THEN SLOWLY COOLING TO ABOUT 900*C., AND THEN HEAT-TREATIG THE RESULTANT SINGLE-CRYSTAL MAGNET IN A MAGNETIC FIELD AND AGING SAID MAGNET.
References Cited (Backward Citations)
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Cited
US3027281A
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US3175901A
Cited
US3226266A
Cited
US3219496A
Cited
US3219495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |