US3558372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making permanent magnet material powders
Assignee: General Electric Co
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Filing: 1968-01-31
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Granted: 1971-01-26
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Expires: 1988-01-31
Abstract
Abstract THE COERCIVE FORCE OF A COBALT-RARE EARTH INTERMETALLIC COMPOUND IS GREATLY ENHANCED BY CHEMICALLY TREATING THE COMPOUND IN FINELY-DIVIDED FORM SO AS TO SMOOTH THE SURFACES OF THE INDIVIDUAL PARTICLES.
Inventors
- 👤 Joseph J Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/04; C23F3/06; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; C22; C22C; C22C19/00; C22C19/07; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |