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US4239533A
Expired / Lapsed
US
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Magnetic alloy having a low melting point
Assignee: Proterial Ltd
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Filing: 1978-05-09
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Granted: 1980-12-16
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Expires: 1998-05-09
Abstract
Abstract A magnetic alloy having a relatively low melting point, particularly for dental use. The low melting point magnet alloy contains one or more elements of Co and Ni, a Co content of which being in the range of 79 wt. % or less, a Ni content being in the range of 80 wt. % or less, the remainder being essentially a Pd content.
Inventors
- 👤 Takeshi Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:43
CPC Classifications
C; C22; C22C; C22C19/00; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A magnet alloy which consists essentially of Co, Ni and Pd, the content of Co being in the range of from 20 to 70 weight %, the content of Ni being in the range of 29 to 80 weight %, and the content of Pd being at least 35 weight %, said alloy having a magnetic flux density value B 100 of at least 2000 G and a melting point of not more than 1350° C.
Claim 2
Dependent Claim
76 words
A magnet alloy which consists essentially of Co, Ni and Pd, the content of Co being in the range of from 20 to 70 weight %, the content of Ni being in the range of 29 to 80 weight %, and the content of Pd being at least 35 weight %, said alloy having a magnetic flux density value B 100 of at least 2000 G and a melting point of not more than 1350° C.
Claim 3
Dependent Claim
138 words
A magnet alloy which consists essentially of Co, Ni, Pd and at least one additive element, the content of Co being 20 to 70 weight %, the content of Ni being in the range of 29 to 80 weight %, the content of Pd being at least 35 weight % and the at least one additive element being selected from the group consisting of 15 weight % or less Cr, 30 weight % or less Fe, 20 weight % or less Cu, 3 weight % or less Zn, 3 weight % or less Sn, 20 weight % or less Pt, 23 weight % or less Au and 3 weight % or less Ag, said alloy having a magnetic flux density value B 100 of at least 2000 G and a melting point of not more than 1350° C.
Claim 4
Dependent Claim
138 words
A magnet alloy which consists essentially of Co, Ni, Pd and at least one additive element, the content of Co being 20 to 70 weight %, the content of Ni being in the range of 29 to 80 weight %, the content of Pd being at least 35 weight % and the at least one additive element being selected from the group consisting of 15 weight % or less Cr, 30 weight % or less Fe, 20 weight % or less Cu, 3 weight % or less Zn, 3 weight % or less Sn, 20 weight % or less Pt, 23 weight % or less Au and 3 weight % or less Ag, said alloy having a magnetic flux density value B 100 of at least 2000 G and a melting point of not more than 1350° C.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |