US4190438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous magnetic alloy
Assignee: Sony Corp
•
Filing: 1978-09-07
•
Granted: 1980-02-26
•
Expires: 1998-09-07
Abstract
Abstract An amorphous magnetic alloy consists of 2 to 20 at % (atomic percent) of ruthenium atoms; 10 to 30 at % of atoms of at least one amorphous forming element selected from the group consisting of phosphorus, carbon, silicon, boron and germanium; and iron atoms as the predominant component of the balance.
Inventors
- 👤 Koichi Aso
- 👤 Satoru Uedaira
- 👤 Shigeyasu Ito
- 👤 Hidemasa Tamura
- 👤 Yoshimi Makino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:34
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308; C; C22; C22C; C22C45/00; C22C45/02; G; G11; G11B; G11B5/00; G11B5/127
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
An amorphous magnetic alloy consisting essentially of: (A) from 2 to 20 atomic % ruthenium; (B) from 10 to 30 atomic % of at least one amorphous element selected from the group consisting of phosphorus, carbon, silicon, boron, and germanium; (C) from 0 to 20 atomic % cobalt, nickel, or mixtures of the two, and (D) the balance being at least 70 atomic % iron.
Claim 2
Dependent Claim
65 words
An amorphous magnetic alloy consisting essentially of: (A) from 2 to 20 atomic % ruthenium; (B) from 10 to 30 atomic % of at least one amorphous element selected from the group consisting of phosphorus, carbon, silicon, boron, and germanium; (C) from 0 to 20 atomic % cobalt, nickel, or mixtures of the two, and (D) the balance being at least 70 atomic % iron.
Claim 3
Dependent Claim
31 words
An amorphous magnetic alloy according to claim 1, in which the atoms of said at least one amorphous forming element are contained within the range of 15 to 28 at %.
Claim 4
Dependent Claim
53 words
An amorphous magnetic alloy according to claim 1, in which, when the contents of phosphorus (P), carbon (C), silicon (Si), boron (B), and germanium (Ge) as said amorphous forming element are expressed by Pv Cw Six By Gez, where v+w+x+y+z=1, they are within the following ranges, respectively: v≦1, w≦0.7, x≦0.7, y≦1 and z≦0.7.
Claim 5
Dependent Claim
31 words
An amorphous magnetic alloy according to claim 3, in which only silicon and boron are present as said amorphous forming elements and are contained in the ratio of 75/25 to 5/95.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |