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US4537808A
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Electrically conductive composite material
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-04-23
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Granted: 1985-08-27
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Expires: 2004-04-23
Abstract
Abstract An electrically conductive composite material having a copper core and an iron- or nickel-base alloy clad material, with the cross sectional ratio of the clad material to core satisfying the relation 0.1<Se/(Se+Scu)</=0.8 and the tensile strength P (in kg/mm2) satisfies the relation 230-1.9x(100Scu+2.3Se)/Se+Scu)>/=P>/=80-0.4x(100Scu+2.3Se)/Se+Scu), where Se represents the cross-sectional area of the clad material and Scu represents the cross-sectional area of the copper core. The clad material may be made of iron, steel, alloyed steel, stainless steel, or a steel inner layer and a stainless steel outer layer.
Inventors
- 👤 Susumu Yamamoto
- 👤 Kazuyoshi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:55
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; B; B32; B32B; B32B15/00; B32B15/01; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291; Y10T428/12917; Y10T428/12924; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
An electrically conductive composite comprising: a copper or copper alloy core; an iron- or nickel-base alloy clad material surrounding the core; the cross-sectional ratio of the clad material to core is within the range of: 0.1≦Se/(Se+Scu)≦0.8 where: Se is the cross-sectional area of the clad material, Scu is the cross-sectional area of the copper-core and, the tensile strength P in kg/mm is within the range of: 230-1.9(100Scu+2.3Se)/(Se+Scu)≦P≦80-0.4 (100Scu+2.3Se)/(Se+Scu).
Claim 2
Dependent Claim
68 words
An electrically conductive composite comprising: a copper or copper alloy core; an iron- or nickel-base alloy clad material surrounding the core; the cross-sectional ratio of the clad material to core is within the range of: 0.1≦Se/(Se+Scu)≦0.8 where: Se is the cross-sectional area of the clad material, Scu is the cross-sectional area of the copper-core and, the tensile strength P in kg/mm is within the range of: 230-1.9(100Scu+2.3Se)/(Se+Scu)≦P≦80-0.4 (100Scu+2.3Se)/(Se+Scu).
Claim 3
Dependent Claim
13 words
The composite of claim 1 wherein the clad material is made of iron.
Claim 4
Dependent Claim
13 words
The composite of claim 1 wherein the clad material is made of steel.
Claim 5
Dependent Claim
14 words
The composite of claim 1 wherein the clad material is made of alloyed steel.
Claim 6
Dependent Claim
14 words
The composite of claim 1 wherein the clad material is made of stainless steel.
Claim 7
Dependent Claim
20 words
The composite of claim 1 wherein the clad material comprises a steel inner layer and a stainless steel outer layer.
References Cited (Backward Citations)
US4353951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |