US4219355A
Expired / Lapsed
US
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Iron-metalloid amorphous alloys for electromagnetic devices
Assignee: Honeywell International Inc
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Filing: 1979-05-25
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Granted: 1980-08-26
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Expires: 1999-05-25
Abstract
Abstract An amorphous metal alloy which is at least 90% amorphous having enhanced magnetic properties and consisting essentially of a composition having the formula Fe a B b Si c C d wherein "a", "b", "c" and "d" are atomic percentages ranging from about 80.0 to 82.0, 12.5 to 14.5, 2.5 to 5.0 and 1.5 to 2.5, respectively, with the proviso that the sum of "a", "b", "c" and "d" equals 100.
Inventors
- 👤 Nicholas J. DeCristofaro
- 👤 Alfred Freilich
- 👤 Davidson M. Nathasingh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C22; C22C; C22C35/00; B; B22; B22D; B22D11/00; B22D11/06; B22D11/0611; C22C45/00; C22C45/02; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A metal alloy which is at least 90% amorphous consisting essentially of a composition having the formula Fe a B b Si c C d wherein "a", "b", "c" and "d" are atomic percentages ranging from about 80.0 to 82.0, 12.5 to 14.5, 2.5 to 5.0 and 1.5 to 2.5, respectively, with the proviso that the sum of "a", "b", "c" and "d" equals 100.
Claim 2
Dependent Claim
65 words
A metal alloy which is at least 90% amorphous consisting essentially of a composition having the formula Fe a B b Si c C d wherein "a", "b", "c" and "d" are atomic percentages ranging from about 80.0 to 82.0, 12.5 to 14.5, 2.5 to 5.0 and 1.5 to 2.5, respectively, with the proviso that the sum of "a", "b", "c" and "d" equals 100.
Claim 3
Dependent Claim
19 words
An amorphous metal alloy as recited in claim 1, wherein said alloy is at least about 97 percent amorphous.
Claim 4
Dependent Claim
16 words
An amorphous metal alloy as recited in claim 1, wherein said alloy is 100 percent amorphous.
Claim 5
Dependent Claim
22 words
An amorphous metal alloy as recited in claim 1, wherein "a", "b", "c" and "d" are 81, 13.5, 3.5 and 2, respectively.
Claim 6
Dependent Claim
74 words
A core for use in an electromagnetic device comprising a metal alloy which is at least 90% amorphous consisting essentially of a composition having the formula Fe a B b Si c C d wherein "a", "b", "c" and "d" are atomic percentages ranging from about 80.0 to 82.0, 12.5 to 14.5, 2.5 to 5.0 and 1.5 to 2.5, respectively, with the proviso that the sum of "a", "b", "c" and "d" equals 100.
Claim 7
Dependent Claim
74 words
A core for use in an electromagnetic device comprising a metal alloy which is at least 90% amorphous consisting essentially of a composition having the formula Fe a B b Si c C d wherein "a", "b", "c" and "d" are atomic percentages ranging from about 80.0 to 82.0, 12.5 to 14.5, 2.5 to 5.0 and 1.5 to 2.5, respectively, with the proviso that the sum of "a", "b", "c" and "d" equals 100.
References Cited (Backward Citations)
US3856513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |