US3950194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet materials
Assignee: Panasonic Holdings Corp
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Filing: 1974-07-17
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Granted: 1976-04-13
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Expires: 1994-07-17
Abstract
Abstract Rare earth cobalt magnet materials, which comprised of cobalt, manganese, copper and 12 to 13 mole % of cerium and/or samarium are provided. These magnetic materials have improved magnetic characteristics, especially very high values of the maximum energy product.
Inventors
- 👤 Hozumi Hirota
- 👤 Yoshio Tawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/047; H01F1/053; H01F1/055; H01F1/0555; H01F1/0557
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
43 words
A magnetic composition having a maximum energy product of above 12 MG.sup.. Oe comprising 12 to 13 mole % of at least one member selected from the group consisting of cerium and samarium, and the balance consisting essentially of cobalt, manganese and copper.
Claim 2
Dependent Claim
43 words
A magnetic composition having a maximum energy product of above 12 MG.sup.. Oe comprising 12 to 13 mole % of at least one member selected from the group consisting of cerium and samarium, and the balance consisting essentially of cobalt, manganese and copper.
Claim 3
Dependent Claim
51 words
A magnetic composition as claimed in claim 1, wherein said magnetic composition consists essentially of 1.2 to 11.05 mole % of Ce, 1.8 to 11.7 mole % of Sm, 60.9 to 77.44 mole % of Co, 2.175 to 10.56 mole % of Mn and 7.83 to 15.84 mole % of Cu.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |