US3588764A
Expired / Lapsed
US
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Magnetic alloy and devices utilizing same
Assignee: AT&T Inc
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Filing: 1969-11-26
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Granted: 1971-06-28
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Expires: 1989-11-26
Abstract
Abstract Alloys having the nominal composition in weight percent 30 percent cobalt, 15 percent chromium, 5 percent manganese, 0.05 percent carbon, remainder iron, when cold worked to an area reduction of at least 50 percent and annealed at a temperature of 500 degrees to 650 degrees C. for a time of from one minute to 10 hours, exhibit a square hysteresis loop, medium coercive force, and high residual induction, enabling their use in a variety of magnetic devices such as bistable switches and memories.
Inventors
- 👤 Karl M Olsen
- 👤 Raymond C Stoffers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:31
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C22; C22C; C22C38/00; C22C38/18; C22C38/30; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01H; H01H1/00; H01H1/02; H01H1/0201; H01H51/00; H01H51/28; H01H51/284; H01H51/285; C21D8/1216; C21D8/1233; C21D8/1244
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |