US4263044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron/chromium/cobalt-base spinodal decomposition-type magnetic alloy
Assignee: Japan Kinoko Research Center Foundation
•
Filing: 1979-04-06
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Granted: 1981-04-21
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Expires: 1999-04-06
Abstract
Abstract A spinodal decomposition type magnetic alloy consisting by weight essentially of 15 to 23% chromium, 10 to 18% cobalt, 0.5 to 4% vanadium, 0.3 to 3% titanium, 0.1 to 2.5% tungsten and the balance iron. The magnetic alloy can be cast into a machinable permanent magnet body and has a high magnetic energy property.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:01
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/30; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/047; H01F1/053; H01F1/055
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
35 words
A spinodal decomposition type magnetic alloy consisting by weight essentially of 19 to 23% chromium, 10 to 18% cobalt, 0.5 to 4% vanadium, 0.3 to 3% titanium, 0.1 to 2.5% tungsten and the balance iron.
Claim 2
Dependent Claim
35 words
A spinodal decomposition type magnetic alloy consisting by weight essentially of 19 to 23% chromium, 10 to 18% cobalt, 0.5 to 4% vanadium, 0.3 to 3% titanium, 0.1 to 2.5% tungsten and the balance iron.
Claim 3
Dependent Claim
14 words
The alloy defined in claim 1 which contains 20 to 22% by weight chromium.
Claim 4
Dependent Claim
11 words
The alloy defined in claim 2 which contains about 21% chromium.
Claim 5
Dependent Claim
14 words
The alloy defined in claim 1 which contains 13 to 17% by weight cobalt.
Claim 6
Dependent Claim
12 words
The alloy defined in claim 4 which contains 15% by weight cobalt.
Claim 7
Dependent Claim
14 words
The alloy defined in claim 1 which contains 1 to 3% by weight vanadium.
Claim 8
Dependent Claim
13 words
The alloy defined in claim 6 which contains about 2% by weight vanadium.
Claim 9
Dependent Claim
12 words
The alloy defined in claim 1 which contains 0.2 to 2.0% tungsten.
Claim 10
Dependent Claim
13 words
The alloy defined in claim 8 which contains about 1% by weight tungsten.
Claim 11
Dependent Claim
12 words
The alloy defined in claim 1 which contains 1 to 2.2% titanium.
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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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |