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US3661567A
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US
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Magnet alloys
Assignee: Panasonic Holdings Corp
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Filing: 1967-12-06
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Granted: 1972-05-09
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Expires: 1987-12-06
Abstract
Abstract A ternary permanent magnet alloy which is composed of 69.5 to 73.0 percent by weight of Mn, 26.4 to 29.5 percent by weight of Al and 0.6 to (1/3 Mn-22.16) percent by weight of C, and primarily consists of a body-centered tetragonal structure phase, and which has magnetic characteristics of BHmax > OR = 1.0 X 106 G.Oe, Br > OR = 2,800 G. and BHc > OR = 1,400 Oe., excellent magnetic stability, mechanical properties, weather resistance and corrosion resistance, and are not susceptible to spontaneous disintegration in the atmosphere.
Inventors
- 👤 Hiroshi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:53
CPC Classifications
C; C22; C22C; C22C28/00
Claims Analysis
Total Claims: 0
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |