US3836406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PERMANENT MAGNETIC Fe-Mn-Cr ALLOY CONTAINING NITROGEN
Assignee: DIRECTOR OF NAT RES INST FOR M
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Filing: 1973-12-21
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Granted: 1974-09-17
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Expires: 1993-12-21
Abstract
Abstract A permanent magnetic alloy consists essentially of 0.05 - 0.5 wt. percent N, 5- 15 wt. percent Mn, 2- 12 wt. percent Cr, and remainder iron, produced by solution treatment at a temperature not lower than 900*C, cold rolling to a thickness reduction of 10- 98 percent and if desired, aging at 100* - 800*C. The alloy may additionally contain Mo, Co, A1, C, Nb, Ti, Zr and V.
Inventors
- 👤 R Yoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:17
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38; C21; C21D; C21D8/00; C21D8/12; C22C38/001; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; C21D8/1216; C21D8/1233; C21D8/1244; C21D8/1272
Claims Analysis
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |