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US3926751A
Expired / Lapsed
US
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Method of electrowinning metals
Assignee: ELECTRODE Corp A DE CORP
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Filing: 1975-01-31
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Granted: 1975-12-16
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Expires: 1995-01-31
Abstract
Abstract Novel electrode for oxygen evolution comprising an electroconductive base provided with an outer coating containing a mixed crystal material of tantalum oxide and iridium oxide and preparation and use thereof.
Inventors
- 👤 Nora Oronzio De
- 👤 Giuseppe Bianchi
- 👤 Antonio Nidola
- 👤 Giovanni Trisoglio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A METHOD OF ELECTROWINNING METALS COMPRISING PASSING AN ELECTRIC CURRENT THROUGH AN ANODE HAVING AN ELECTRO-CONDUCTIVE BASE PROVIDED WITH A COATING OVER AT LEAST A PORTION OF ITS OUTER SURFACE OF A MIXED MATERIAL OF TANTALUM OXIDE AND IRIDIUM OXIDE, THEN AN ACID AQUEOUS ELECTROLYTE CONTAINING THE METAL TO BE ELECTROWINNED AND THEN THE CATHODE ON WHICH THE ELECTROWINNED METAL IS DISPOSED, THE RATIO OF TANTALUM OR IRIDIUM CALCULATED AS METAL IS 7:1 TO 0:34 TO 1.
Claim 2
Independent Claim
77 words
A METHOD OF ELECTROWINNING METALS COMPRISING PASSING AN ELECTRIC CURRENT THROUGH AN ANODE HAVING AN ELECTRO-CONDUCTIVE BASE PROVIDED WITH A COATING OVER AT LEAST A PORTION OF ITS OUTER SURFACE OF A MIXED MATERIAL OF TANTALUM OXIDE AND IRIDIUM OXIDE, THEN AN ACID AQUEOUS ELECTROLYTE CONTAINING THE METAL TO BE ELECTROWINNED AND THEN THE CATHODE ON WHICH THE ELECTROWINNED METAL IS DISPOSED, THE RATIO OF TANTALUM OR IRIDIUM CALCULATED AS METAL IS 7:1 TO 0:34 TO 1.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the electro-conductive base is a valve metal.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the valve metal is titanium.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the electro-conductive base is titanium alloyed with up to 0.2% by weight of palladium.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein the coating also contains an oxide of a doping metal selected from the group consisting of alkaline earth metal, cobalt, iron, nickel, chromium, molybdenum and manganese.
Claim 7
Dependent Claim
19 words
The method of claim 5 wherein the doping metal is selected from the group consisting of cobalt and calcium.
References Cited (Backward Citations)
US3878083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |