US3682716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered intermetallic product of cobalt,samarium and cerium mischmetal and permanent magnets produced therefrom
Assignee: General Electric Co
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Filing: 1970-08-24
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Granted: 1972-08-08
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Expires: 1990-08-24
Abstract
Abstract NOVEL SINTERDD COBALT-RARE EARTH INTERMETALLIC PRODUCTS ARE USED TO FORM PERMANENT MAGNETS HAVING UNIQUE PROPERTIES. THE SINTERED PRODUCT IS COMPRISED OF INTERMETALLIC COMPOUNDS OF COBALT AND RARE EARTH METALS COMPOSED OF SAMARIUM AND CERIUM MISCHMETAL. COBALT IS PRESENT IN AN AMOUNT OF ABOUT 61 TO 66 PERCENT BY WEIGHT OF THE PRODUCT AND THE RARE EARTH METALS ARE PRESENT IN AN AMOUNT OF ABOUT 34 TO 39 PERCENT BY WEIGHT OF THE PRODUCT WITH THE CERIUM MISCHMETAL COMPONENT RANGING IN AMOUNT FROM ABOUT 10 TO 90 PERCENT BY WEIGHT OF THE RARE, EARTH CONTENT, PERMANENT MAGNETS ARE FORMED FROM THE SINTERED PRODUCT IN BULK FORM OR IN PARTICULATE FORM.
Inventors
- 👤 Donald L Martin
- 👤 Mark G Benz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:09
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/086; C; C22; C22C; C22C19/00; C22C19/07
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |