US3923612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating a gold-platinum alloy and electrolyte therefor
Assignee: United States Department of Energy
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Filing: 1974-02-25
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Granted: 1975-12-02
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Expires: 1994-02-25
Abstract
Abstract An electroplating bath for the deposition of gold-platinum alloys comprising an aqueous solution of alkali metal hexahydroxyplatinate and alkali metal aurate. Preferably, the solution comprises sufficient alkali metal hexahydroxyplatinate to provide from substantially 15 to substantially 25 grams of platinum per liter and sufficient alkali metal aurate to provide from substantially 0.5 to substantially 3.0 grams of gold per liter. The bath is operated at a temperature preferably in the range of from substantially 50*C to substantially 65*C.
Inventors
- 👤 Harold J Wiesner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:03
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/62
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
AN AQUEOUS ELECTROLYTE SOLUTION FOR THE ELECTRODEPOSITION OF GOLD-PLATINUM ALLOYS COMPRISING AN ALKALI METAL HEXAHYDROXYPLATINATE AND AN ALKALI METAL AURATE AND WHEREIN THE PH OF THE SOLUTION IS ABOVE SUBSTANTIALLY 11.0.
Claim 2
Dependent Claim
31 words
AN AQUEOUS ELECTROLYTE SOLUTION FOR THE ELECTRODEPOSITION OF GOLD-PLATINUM ALLOYS COMPRISING AN ALKALI METAL HEXAHYDROXYPLATINATE AND AN ALKALI METAL AURATE AND WHEREIN THE PH OF THE SOLUTION IS ABOVE SUBSTANTIALLY 11.0.
Claim 3
Dependent Claim
42 words
An electrolyte solution as claimed in claim 1 wherein the alkali metal hexahydroxyplatinate is selected from the group consisting of sodium hexahydroxyplatinate and potassium hexahydroxyplatinate, and the alkali metal aurate is selected from the group consisting of sodium aurate and potassium aurate.
Claim 4
Dependent Claim
33 words
An electrolyte solution as claimed in claim 1 wherein the concentration of the alkali metal hexahydroxyplatinate is sufficient to provide from substantially 15 to substantially 25 grams of platinum per liter of solution.
Claim 5
Dependent Claim
33 words
An electrolyte solution as claimed in claim 1 wherein the concentration of the alkali metal aurate is sufficient to provide from substantially 0.5 to substantially 3.0 grams of gold per liter of solution.
Claim 6
Dependent Claim
62 words
An electrolyte solution as claimed in claim 1 wherein the alkali metal hexahydroxyplatinate is potassium hexahydroxyplatinate in a concentration sufficient to provide from substantially 19 to substantially 22 grams of platinum per liter of solution and the alkali metal aurate is potassium aurate in a concentration sufficient to provide from substantially 0.5 to substantially 3.0 grams of gold per liter of solution.
Claim 7
Dependent Claim
29 words
A process for the electrodeposition of gold-platinum alloys which comprises electrolyzing an aqueous electrolyte solution as claimed in claim 1 at a temperature between substantially 50*C and substantially 65*C.
References Cited (Backward Citations)
GB928083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |