Patent US4525432A successfully refreshed from Google Patents.
US4525432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic material wire
Assignee: Fujikura Ltd
•
Filing: 1983-06-20
•
Granted: 1985-06-25
•
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 16:19
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.
References Cited (Backward Citations)
US1586887A
Cited
US1586888A
Cited
GB987812A
Cited
US3218384A
Cited
US3411892A
Cited
US3296364A
Cited
US3316344A
Cited
US3316345A
Cited
US3443914A
Cited
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 |