US3371044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite magnets
Assignee: Westinghouse Electric Corp
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Filing: 1964-01-24
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Granted: 1968-02-27
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Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 Alexander W Cochardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/10; H01F1/11; H01F1/113; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A CERAMIC PERMANENT MAGNET COMPRISING A SEMISINTERED FERRITE BODY OF HIGH POROSITY AND EXHIBITING AN INTRINSIC COERCIVE FORCE OF MORE THAN 2500 OERSTEDS, THE PORES OF SAID FERRITE BODY BEING FILLED WITH A MATRIAL CAPABLE OF CONFERRING SUBSTANTIAL STRUCTURAL STRENGTH TO THE FERRITE BODY AND ALSO BEING CHARACTERIZED BY GOOD MACHINABILITY WHEREBY THE MAGNET AS A WHOLE POSSESSES RELATIVELY GOOD STRENGTH AND MACHINABILITY.
Claim 2
Dependent Claim
63 words
A CERAMIC PERMANENT MAGNET COMPRISING A SEMISINTERED FERRITE BODY OF HIGH POROSITY AND EXHIBITING AN INTRINSIC COERCIVE FORCE OF MORE THAN 2500 OERSTEDS, THE PORES OF SAID FERRITE BODY BEING FILLED WITH A MATRIAL CAPABLE OF CONFERRING SUBSTANTIAL STRUCTURAL STRENGTH TO THE FERRITE BODY AND ALSO BEING CHARACTERIZED BY GOOD MACHINABILITY WHEREBY THE MAGNET AS A WHOLE POSSESSES RELATIVELY GOOD STRENGTH AND MACHINABILITY.
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |