Patent US729395A successfully refreshed from Google Patents.
Patent US4382061A successfully refreshed from Google Patents.
US4382061A
Expired / Lapsed
US
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Alloy preparation for permanent magnets
Assignee: Evonik Operations GmbH
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Filing: 1981-08-05
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Granted: 1983-05-03
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Expires: 2001-08-05
Abstract
Abstract This invention relates to an alloy suitable for the production of permanent magnets and based on a cobalt/rare earth metal alloy in the atomic ratio of 5:1 to 7:2, where the rare earth metal component is composed of about 40 to 60 atomic percent of samarium, about 15 to 30 atomic percent of lanthanum, about 15 to 30 atomic percent of neodymium, and the remainder is a content of other rare earth metals resulting from preparation.
Inventors
- 👤 Camillo Herget
- 👤 Hans-Gunter Domazer
- 👤 Mircea Velicescu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:42
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A cobalt/rare earth metal alloy in the atomic ratio of 5:1 to 7:2, and being suitable for the production of permanent magnets, where the rare earth metal component is composed of about 40 to 60 atomic percent of samarium, about 15 to 30 atomic percent of lanthanum, about 15 to 30 atomic percent of neodymium, and the remainder is a content of other rare earth metals resulting from preparation.
Claim 2
Dependent Claim
69 words
A cobalt/rare earth metal alloy in the atomic ratio of 5:1 to 7:2, and being suitable for the production of permanent magnets, where the rare earth metal component is composed of about 40 to 60 atomic percent of samarium, about 15 to 30 atomic percent of lanthanum, about 15 to 30 atomic percent of neodymium, and the remainder is a content of other rare earth metals resulting from preparation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |