US2694790A
Expired / Lapsed
US
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Sintered anisotropic permanent magnet
Assignee: General Electric Co
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Filing: 1948-02-17
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Granted: 1954-11-16
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Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 Robert J Studders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:28
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN ANISOTROPIC SINTERED PERMANENT MAGNET CONTAINING 7.5 TO 9% ALUMINUM, 13 TO 15% NICKEL, 22 TO 26% COBALT, 2 TO 4% COPPER, 0.6 TO 1.50% TITANIUM, BALANCE IRON EXCEPT FOR INCIDENTAL IMPURITIES, SAID MAGNET HAVING A BH MAX. IN THE PRINCIPAL DIRECTION AT LEAST EQUAL TO 3.5X106.
Claim 2
Dependent Claim
47 words
AN ANISOTROPIC SINTERED PERMANENT MAGNET CONTAINING 7.5 TO 9% ALUMINUM, 13 TO 15% NICKEL, 22 TO 26% COBALT, 2 TO 4% COPPER, 0.6 TO 1.50% TITANIUM, BALANCE IRON EXCEPT FOR INCIDENTAL IMPURITIES, SAID MAGNET HAVING A BH MAX. IN THE PRINCIPAL DIRECTION AT LEAST EQUAL TO 3.5X106.
References Cited (Backward Citations)
GB102215A
Cited
GB462248A
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US2245477A
Cited
US2167240A
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GB522731A
Cited
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Cited
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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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |