US4014660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-tinned wire for electrotechnical purposes and method for its production
Assignee: Siemens AG
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Filing: 1974-10-31
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Granted: 1977-03-29
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Expires: 1994-10-31
Abstract
Abstract Hot-tinned wire of copper or copper alloys is provided having a first coating of from 0.5 to 2 μm thick consisting of an SnBi alloy containing 2 to 10 percent by weight Bi or of a SnNi alloy containing 0.2 to 1 percent by weight Ni, and having a second coating 1 to 4 μm thick consisting of pure tin or of a SnPb alloy. The first coating acts as diffusion retarding film and retards the Cu 3 Sn phase growth considerably.
Inventors
- 👤 Horst Schreiner
- 👤 Dieter Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/08; Y; Y10; Y10S; Y10S228/00; Y10S228/904; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A hot-tinned wire of copper or copper alloys having a two-later coating of tin or tin alloys, wherein the first inner coating is of a thickness between 0.5 and 2 μm and consists of a SnBi alloy containing between 2 and 10 percent by weight of Bi or of a SnNi alloy containing between 0.2 and 1 percent by weight of Ni and a second outer coating of a thickness between 1 and 4 μm consisting of pure tin or a SnPb alloy.
Claim 2
Dependent Claim
83 words
A hot-tinned wire of copper or copper alloys having a two-later coating of tin or tin alloys, wherein the first inner coating is of a thickness between 0.5 and 2 μm and consists of a SnBi alloy containing between 2 and 10 percent by weight of Bi or of a SnNi alloy containing between 0.2 and 1 percent by weight of Ni and a second outer coating of a thickness between 1 and 4 μm consisting of pure tin or a SnPb alloy.
Claim 3
Dependent Claim
30 words
The hot-tinned wire of claim 1, wherein the first inner coating is of a thickness of 1 μm and the second outer coating is of a thickness of 2 μm.
Claim 4
Dependent Claim
33 words
The hot-tinned wire of claim 1, wherein the first inner coating consists of a SnBi alloy containing 5 percent by weight Bi or of a SnNi alloy containing 0.5 percent by weight Ni.
Claim 5
Dependent Claim
25 words
The hot-tinned wire of claim 1, wherein the second outer coating consists of a SnPb alloy containing between 40 and 70 percent by weight Pb.
Claim 6
Dependent Claim
147 words
A method for producing the hot-tinned wire of claim 1 comprising; a. passing a wire of copper or copper alloy through a first tin alloy bath, said alloy being a Bi-Sn alloy containing from 2 to 10 percent by weight of Bi or a Sn-Ni alloy containing from 0.2 to 1 percent by weight of Ni; b. calibrating said wire by means of a first stripper member to provide an inner coating of a thickness between 0.5 and 2 μm on said wire; c. cooling said wire to completely solidify said coating; d. passing said coated wire through a second tin alloy bath, said alloy being a pure tin or Sn-Pb alloy; e. calibrating said wire by means of a first stripper member to provide an outer coating of a thickness between 1 and 4 μm; and f. cooling said wire to completely solidify said outer coating.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |