US4259109A
Expired / Lapsed
US
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Beryllium-containing iron-boron glassy magnetic alloys
Assignee: Honeywell International Inc
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Filing: 1979-05-03
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Granted: 1981-03-31
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Expires: 1999-05-03
Abstract
Abstract Introduction of beryllium into iron-boron base glassy alloys improves the thermal stability while substantially retaining the saturation moment and significantly reducing the saturation magnetostriction of the base alloy. The alloys of the invention consist essentially of about 6 to 18 atom percent boron, about 2 to 14 atom percent beryllium and about 72 to 85 atom percent iron plus incidental impurities.
Inventors
- 👤 Ryusuke Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:14
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
A beryllium-substituted, iron-boron, primarily glassy magnetic alloy consisting essentially of about 6 to 12 atom percent boron, about 10 to 14 atom percent beryllium and about 80 to 85 atom percent iron plus incidental impurities, said alloy having a saturation magnetostriction less than about 20 parts per million.
Claim 2
Dependent Claim
48 words
A beryllium-substituted, iron-boron, primarily glassy magnetic alloy consisting essentially of about 6 to 12 atom percent boron, about 10 to 14 atom percent beryllium and about 80 to 85 atom percent iron plus incidental impurities, said alloy having a saturation magnetostriction less than about 20 parts per million.
Claim 3
Dependent Claim
15 words
The alloy of claim 1 in which the beryllium content is about 14 atom percent.
Claim 4
Dependent Claim
9 words
The alloy of claim 1 which is substantially glassy.
Claim 5
Dependent Claim
52 words
An electro-magnetic core containing a beryllium-substituted, iron-boron, primarily glassy magnetic alloy consisting essentially of about 6 to 10 atom percent boron, about 12 to 14 atom percent beryllium and about 80 to 85 atom percent iron plus incidental impurities, said alloy having a saturation magnetostriction less than about 20 parts per million.
Claim 6
Dependent Claim
52 words
An electro-magnetic core containing a beryllium-substituted, iron-boron, primarily glassy magnetic alloy consisting essentially of about 6 to 10 atom percent boron, about 12 to 14 atom percent beryllium and about 80 to 85 atom percent iron plus incidental impurities, said alloy having a saturation magnetostriction less than about 20 parts per million.
Claim 7
Dependent Claim
20 words
An electro-magnetic core as recited in claim 4, wherein the beryllium content of said alloy is about 14 atom percent.
Claim 8
Dependent Claim
14 words
An electro-magnetic core as recited in claim 4, wherein said alloy is substantially glassy.
References Cited (Backward Citations)
US4036638A
Cited
US4152147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |