US4525432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic material wire
Assignee: Fujikura Ltd
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Filing: 1983-06-20
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Granted: 1985-06-25
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Expires: 2003-06-20
Abstract
Abstract A magnetic material wire is composed of a core of magnetic material having a Curie point of 70° to 250° C. and a high conductive metal sheathing of a uniform thickness covering the core. The ratio of the metal sheathing to the wire in cross-section is in the range of 15 to 40%. There is also disclosed a method of producing such a wire.
Inventors
- 👤 Takashi Saito
- 👤 Kazumoto Suzuki
- 👤 Yoshihiro Naganuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:51
CPC Classifications
H; H02; H02G; H02G7/00; H02G7/16; H01; H01B; H01B1/00; H01B1/02; H01B1/023; H01B1/026; Y; Y02; Y02A; Y02A30/00; Y02A30/14; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799; Y10T428/12861; Y10T428/12903; Y10T428/1291; Y10T428/12917; Y10T428/12944
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A magnetic material wire for winding around an electric conductor comprising a core of magnetic material having a Curie point of 70° to 250° C., and a high conductive metal sheathing of a uniform thickness covering the core, the ratio of the metal sheathing to the wire in cross-sectional area being in the range of 15 to 40%, which said core containing apart from impurities 32 to 52% by weight of nickel, 0.5 to 9% by weight of chromium, 0.2 to 2% by weight of silicon and balance iron.
Claim 2
Dependent Claim
89 words
A magnetic material wire for winding around an electric conductor comprising a core of magnetic material having a Curie point of 70° to 250° C., and a high conductive metal sheathing of a uniform thickness covering the core, the ratio of the metal sheathing to the wire in cross-sectional area being in the range of 15 to 40%, which said core containing apart from impurities 32 to 52% by weight of nickel, 0.5 to 9% by weight of chromium, 0.2 to 2% by weight of silicon and balance iron.
Claim 3
Dependent Claim
30 words
A magnetic material wire according to claim 1, in which said metal sheathing is made of a material selected from the group consisting of copper, aluminum, zinc and their alloys.
Claim 4
Dependent Claim
13 words
A magnetic material wire according to claim 1, having a reduced residual strain.
Claim 5
Dependent Claim
17 words
A magnetic wire according to claim 1 which has been mechanically treated to improve its magnetic properties.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |