Patent US4128671A successfully refreshed from Google Patents.
US4128671A
Expired / Lapsed
US
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Instant silvering solution
Assignee: Reliance Electric Co
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Filing: 1973-03-14
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Granted: 1978-12-05
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Expires: 1993-03-14
Abstract
Abstract This invention relates to an instant silvering solution that does not require the use of applied electrical current for plating the surfaces of copper and copper-based metal electrical connections and contacts. It is particularly designed for the application to these copper and copper-based metal surfaces for the purposes of reducing electrical resistance and the resulting heating created, caused by the build-up of copper oxide on these surfaces.
Inventors
- 👤 Robert Suggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:29
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A silverplating bath in clear liquid solution form which may be applied to the surface of copper or copper-based substrates to instantaneously deposit a fine layer of silver on the surface thereof without need of applied electric current, said silverplating bath consisting of an aqueous solution in which has been combined two parts by way of sodium cyanide and 1 part of silver nitrate by weight, and the water content of the bath comprises 128 parts by weight.
Claim 2
Dependent Claim
78 words
A silverplating bath in clear liquid solution form which may be applied to the surface of copper or copper-based substrates to instantaneously deposit a fine layer of silver on the surface thereof without need of applied electric current, said silverplating bath consisting of an aqueous solution in which has been combined two parts by way of sodium cyanide and 1 part of silver nitrate by weight, and the water content of the bath comprises 128 parts by weight.
Claim 3
Independent Claim
77 words
A method of silverplating copper or copper-based substrates which does not require application of electrical current wherein the surface to be plated is contacted with a solution produced at room temperature by mixing 2 parts sodium cyanide dissolved in 120 parts water and 1 part silver nitrate dissolved in 8 parts water, and with agitation dissolving the precipitate which forms to a clear solution, the solution instantaneously depositing a fine layer of silver onto the contacted surface.
Claim 4
Independent Claim
77 words
A method of silverplating copper or copper-based substrates which does not require application of electrical current wherein the surface to be plated is contacted with a solution produced at room temperature by mixing 2 parts sodium cyanide dissolved in 120 parts water and 1 part silver nitrate dissolved in 8 parts water, and with agitation dissolving the precipitate which forms to a clear solution, the solution instantaneously depositing a fine layer of silver onto the contacted surface.
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |