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Patent US4473400A successfully refreshed from Google Patents.
US4473400A
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Magnetic metallic glass alloy
Assignee: National Research Development Corp UK
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Filing: 1982-03-24
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Granted: 1984-09-25
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Expires: 2002-03-24
Abstract
Abstract An alloy of composition (by mole) around Fe 80 B 15 Si 5 with additions of up to 4 mole % Ag or Cu or up to 2% Zn or mixtures thereof when rapidly cooled solidifies to a non-crystalline glass structure, which is ductile and magnetically `soft`, i.e. offering a reasonable saturation magnetization yet with low losses. Exemplary glassy alloy: Fe 79 .5 B 15 Si 5 Cu 0 .5.
Inventors
- 👤 Kurt Hoselitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:33
CPC Classifications
C; C22; C22C; 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: 26
Claim 1
Independent Claim
85 words
A metallic glass alloy consisting essentially of, in mole percent: a total aluminum and born content of 10-22 with aluminum ranging from 0--2; 0-8 of carbon; 0-10 of germanium; 0-7 of silicon; a total nickel and iron content of 75-85 with the nickel ranging from 0-2; wherein, in addition to the above-listed elements, said metallic glass alloy further contains at least one element selected from silver, copper and zinc in an amount given by Ag+Cu+2Zn=0.2 to 4 mole percent wherein commercial impurities are not excluded.
Claim 2
Dependent Claim
85 words
A metallic glass alloy consisting essentially of, in mole percent: a total aluminum and born content of 10-22 with aluminum ranging from 0--2; 0-8 of carbon; 0-10 of germanium; 0-7 of silicon; a total nickel and iron content of 75-85 with the nickel ranging from 0-2; wherein, in addition to the above-listed elements, said metallic glass alloy further contains at least one element selected from silver, copper and zinc in an amount given by Ag+Cu+2Zn=0.2 to 4 mole percent wherein commercial impurities are not excluded.
Claim 3
Dependent Claim
17 words
An alloy according to claim 1, wherein the amount of boron is from 12 to 17 percent.
Claim 4
Dependent Claim
10 words
An alloy according to claim 1, wherein aluminium is absent.
Claim 5
Dependent Claim
17 words
An alloy according to claim 1, wherein the amount of carbon is from 0 to 4 percent.
Claim 6
Dependent Claim
10 words
An alloy according to claim 4, wherein carbon is absent.
Claim 7
Dependent Claim
17 words
An alloy according to claim 1, wherein the amount of germanium is from 0 to 4 percent.
Claim 8
Dependent Claim
10 words
An alloy according to claim 6, wherein germanium is absent.
Claim 9
Dependent Claim
17 words
An alloy according to claim 1, wherein the amount of silicon is from 2 to 6 percent.
Claim 10
Dependent Claim
17 words
An alloy according to claim 8, wherein the amount of silicon is from 4 to 51/2 percent.
Claim 11
Dependent Claim
22 words
An alloy according to claim 1, wherein the total of aluminium, boron, carbon, germanium and silicon is from 17 to 22 percent.
Claim 12
Dependent Claim
10 words
An alloy according to claim 1, wherein nickel is absent.
Claim 13
Dependent Claim
17 words
An alloy according to claim 11, wherein the amount of iron is from 78 to 82 percent.
Claim 14
Dependent Claim
10 words
An alloy according to claim 1, wherein silver is absent.
Claim 15
Dependent Claim
17 words
An alloy according to claim 1, wherein the amount of copper is from 0.2 to 11/2 percent.
Claim 16
Dependent Claim
16 words
An alloy according to claim 14, wherein the amount of copper is at least 0.3 percent.
Claim 17
Dependent Claim
16 words
An alloy according to claim 15, wherein the amount of copper is at least 0.6 percent.
Claim 18
Dependent Claim
16 words
An alloy according to claim 14, wherein the amount of copper is up to 1 percent.
Claim 19
Dependent Claim
16 words
An alloy according to claim 17, wherein the amount of copper is up to 0.8 percent.
Claim 20
Dependent Claim
17 words
An alloy according to claim 1, wherein the amount of zinc is from 0 to 1 percent.
Claim 21
Dependent Claim
23 words
An alloy according to claim 1, wherein the total of silver plus copper plus twice the zinc is from 0.2 to 3 percent.
Claim 22
Dependent Claim
23 words
An alloy according to claim 20, wherein the total of silver plus copper plus twice the zinc is from 0.3 to 11/2 percent.
Claim 23
Dependent Claim
17 words
An alloy according to claim 1, whose coercivity (extrapolated to zero frequency) is up to 1 Oersted.
Claim 24
Dependent Claim
18 words
An alloy according to claim 22, whose coercivity (extrapolated to zero frequency) is not more than 0.1 Oersted.
Claim 25
Dependent Claim
90 words
A metallic glass alloy selected from the group of alloys consisting of the following molecular compositions: Fe 79 .5 B 15 Si 5 Cu 0 .5 Fe 79 .6 B 14 .9 Si 5 Zn 0 .5 Fe 79 .2 B 20 Cu 0 .8 Fe 81 .2 B 13 Si 5 Cu 0 .8 Fe 80 .6 B 16 Si 2 .5 Cu 0 .4 Fe 79 .5 B 17 .5 Si 2 .5 Cu 0 .5 Fe 79 .0 B 17 .5 Si 2 .5 Cu 1 .0
Claim 26
Dependent Claim
90 words
A metallic glass alloy selected from the group of alloys consisting of the following molecular compositions: Fe 79 .5 B 15 Si 5 Cu 0 .5 Fe 79 .6 B 14 .9 Si 5 Zn 0 .5 Fe 79 .2 B 20 Cu 0 .8 Fe 81 .2 B 13 Si 5 Cu 0 .8 Fe 80 .6 B 16 Si 2 .5 Cu 0 .4 Fe 79 .5 B 17 .5 Si 2 .5 Cu 0 .5 Fe 79 .0 B 17 .5 Si 2 .5 Cu 1 .0
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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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |