US4385944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic implements from glassy alloys
Assignee: Honeywell International Inc
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Filing: 1980-05-29
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Granted: 1983-05-31
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Expires: 2000-05-29
Abstract
Abstract A method for making magnetic crystallized implements based on glassy metal alloys. Metallic glass alloy powder of suitable ferromagnetic composition is compacted by mechanical, by adhesive bonding or by thermomechanical processes. The resulting compacts can be heat treated to enhance magnetic properties. Compacted bodies exhibit excellent ferromagnetic properties, low remanence, low coercivity and high permeabilities.
Inventors
- 👤 Ryusuke Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:15
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/006; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15358; H01F1/15366
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
A method for making molded magnetic metal alloy articles, comprising: (a) admixing an insulator with ferromagnetic glassy metal powder; (b) compacting said powder with mechanical pressure to form a consolidated magnetic glassy metal body, the powder particles being kept substantially separate by said insulator.
Claim 2
Independent Claim
44 words
A method for making molded magnetic metal alloy articles, comprising: (a) admixing an insulator with ferromagnetic glassy metal powder; (b) compacting said powder with mechanical pressure to form a consolidated magnetic glassy metal body, the powder particles being kept substantially separate by said insulator.
Claim 3
Dependent Claim
24 words
The method as set forth in claim 1 wherein the powder has a composition of the formula [Fe,Ni,Co] 88-65 [Mo,Nb,Ta,Cr,V] 0-10 [P,B,C,Si] 12-25 .
Claim 4
Dependent Claim
28 words
The method according to claim 1 wherein the glassy metal powder is compacted into a form having a density of at least about 60 percent of theoretical maximum.
Claim 5
Dependent Claim
16 words
The method according to claim 1 wherein the glassy metal powder is compacted by cold pressing.
Claim 6
Dependent Claim
23 words
The method according to claim 4 wherein the cold pressing is performed isostatically with isotropic pressure applied to the article from all sides.
References Cited (Backward Citations)
US3725091A
Cited
US3856513A
Cited
US4063942A
Cited
US4069045A
Cited
US4036638A
Cited
US4104787A
Cited
US4197146A
Cited
US4221587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |