US3759745A
Expired / Lapsed
US
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Hydrogen annealing of substituted magnetic garnets and materials so produced
Assignee: AT&T Inc
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Filing: 1971-07-14
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Granted: 1973-09-18
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Expires: 1991-07-14
Abstract
Abstract MAGNETIZATION VALUES FOR A VARIETY OF MAGNETIC GARNETS CONTAINING PARTIAL NONMAGNETIC SUBSTITUTIONAL IONS REPLACING IRON ARE ALTERED BY ANNEALING IN HYDROGEN-CONTAINING ATMOSPHERES. SUCH CHANGES WHICH MAY BE BROUGHT ABOUT IN PERIODS AS SHORT AS FIVE MINUTES OR LESS AT TEMPERATURES OF THE ORDER OF FROM 500*C TO 800*C. RESULT FROM THE TEMPERATURE DEPENDENCE OF SITE PREFERENCE OF SUCH NONMAGNETIC SUBSTITUTIONAL IONS. SUCH CHANGES MAY ACCOMPLISH A "TAILORING" OF THE GARNET MATERIAL FOR USE IN MAGNETIC SWITCHES AND MEMORIES.
Inventors
- 👤 M Dixon
- 👤 A Kurtzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:53
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/18; H01F10/20; H01F10/24; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2675; Y; Y10; Y10S; Y10S428/00; Y10S428/90
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |