US3412461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making ferrite magnets
Assignee: Westinghouse Electric Corp
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Filing: 1963-12-09
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Granted: 1968-11-26
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Cochardt Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:12
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/086; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683; H01F41/00; H01F41/02; H01F41/0253; H01F41/0273; Y; Y10; Y10S; Y10S264/00; Y10S264/58; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE METHOD OF MAKING IMPROVED FERRITE MAGNETS, THE STEPS COMPRISING, PRESSING A SLURRY OF FINELY DIVIDED FERRITE MATERIAL INTO A RELATIVELY FLAT BODY HAVING ITS SMALLEST LATERAL DIMENSION AT LEAST FIVE TIMES THE AVERAGE THICKNESS OF THE BODY, AND CONCURRENTLY SUBJECTING THE ENTIRE BODY TO A STRONG MAGNETIC FIELD DURING THE PRESSING, THE MAGNETIC FIELD HAVING ITS LINES OF FORCE APPLIED PARALLEL TO THE PRESSING DIRECTION AND SUBSTANTIALLY PERPENDICULAR TO THE FACE OF THE RELATIVELY FLAT BODY, THEREBY PRODUCING A GREEN ORIENTED FERRITE BODY, SUBDIVIDING THE GREEN FERRITE BODY INTO A PLURALITY OF SHAPES GENERALLY CORRESPONDING TO THE DESIRED MAGNETS, SINTERING THE INDIVIDUAL SHAPES AND THEREAFTER MAGNETIZING THE RESULTING SINTERED SHAPES TO PROVIDE THE DESIRED MAGNETS.
Claim 2
Dependent Claim
117 words
IN THE METHOD OF MAKING IMPROVED FERRITE MAGNETS, THE STEPS COMPRISING, PRESSING A SLURRY OF FINELY DIVIDED FERRITE MATERIAL INTO A RELATIVELY FLAT BODY HAVING ITS SMALLEST LATERAL DIMENSION AT LEAST FIVE TIMES THE AVERAGE THICKNESS OF THE BODY, AND CONCURRENTLY SUBJECTING THE ENTIRE BODY TO A STRONG MAGNETIC FIELD DURING THE PRESSING, THE MAGNETIC FIELD HAVING ITS LINES OF FORCE APPLIED PARALLEL TO THE PRESSING DIRECTION AND SUBSTANTIALLY PERPENDICULAR TO THE FACE OF THE RELATIVELY FLAT BODY, THEREBY PRODUCING A GREEN ORIENTED FERRITE BODY, SUBDIVIDING THE GREEN FERRITE BODY INTO A PLURALITY OF SHAPES GENERALLY CORRESPONDING TO THE DESIRED MAGNETS, SINTERING THE INDIVIDUAL SHAPES AND THEREAFTER MAGNETIZING THE RESULTING SINTERED SHAPES TO PROVIDE THE DESIRED MAGNETS.
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |