US3795541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic material
Assignee: International Business Machines Corp
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Filing: 1971-11-26
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Granted: 1974-03-05
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Expires: 1991-11-26
Abstract
Abstract A ROOM TEMPERATURE STABLE FERROMGNETIC PERMANENT MAGNET MATERIAL WITH A LARGE FARADAY ROTATION AND HAVING A CURIE TEMPERATURE IN THE REGION OF SUBSTANTIALLY 180-220*C. OF A MUTUAL SOLID SOLUTION HAVING ATOMIC PROPORTIONS INDICATED BY THE FORMULA: MN.8-1.0AL1.3-1.6GE.8-1.0O0.05-.3 IN THE FILM FORM, THE MAGNETIZATION IS NORMAL TO THE FILM PLANE.
Inventors
- 👤 K Lee
- 👤 E Sawatzky
- 👤 J Suits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/16; C; C22; C22C; C22C28/00; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F10/00; H01F10/08; H01F10/10
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |