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Patent US4459189A successfully refreshed from Google Patents.
US4459189A
Expired / Lapsed
US
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Electrode coated with lead or a lead alloy and method of use
Assignee: Eltech Systems Corp
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Filing: 1983-02-16
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Granted: 1984-07-10
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Expires: 2003-02-16
Abstract
Abstract An electrode in particular an oxygen-evolving anode for metal electrowinning from an acid electrolyte comprises a body of aluminum or other metal coated with lead or a lead alloy by electroplating preferably from a non-aqueous electrolyte. The substrate can be a sheet of aluminium or compacted particles of aluminium plated with lead or a lead alloy. A sheet of lead or lead alloy is clad to the electroplated substrate and advantageously an electrocatalytic material such as surface-activated valve metal sponge is applied to the surface of the lead or lead alloy.
Inventors
- 👤 Christopher J. Vance
- 👤 Thinh Nguyen
- 👤 Jean-Marie Fresnel
- 👤 Henri B. Beer
- 👤 Siegfried Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:19
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/046; C25B11/051; C25C; C25C7/00; C25C7/02; C25D3/34; C25D3/36; C25D5/00; C25D5/34; C25D5/38; C25D5/42; C25D5/44; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/665; H01M4/667; H01M4/70; H01M4/72; H01M4/73
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
56 words
An electrolysis electrode comprising an electrically conductive body of a material from the group consisting of aluminium, titanium, zirconium, niobium, molybdenum, tungsten, tantalum, magnesium alloys, iron, steel, nickel, copper, alloys of these metals and graphite, coated with an electroplated layer of lead or lead alloy to which a sheet of lead or lead alloy is bonded.
Claim 2
Dependent Claim
56 words
An electrolysis electrode comprising an electrically conductive body of a material from the group consisting of aluminium, titanium, zirconium, niobium, molybdenum, tungsten, tantalum, magnesium alloys, iron, steel, nickel, copper, alloys of these metals and graphite, coated with an electroplated layer of lead or lead alloy to which a sheet of lead or lead alloy is bonded.
Claim 3
Dependent Claim
21 words
The electrode of claim 1, wherein the electroplated layer of lead or lead alloy is directly plated on the conductive body.
Claim 4
Dependent Claim
23 words
The electrode of claim 1 or 2, wherein the electroplated layer and/or the bonded sheet consist of a lead-silver, lead-antimony or lead-calcium alloy.
Claim 5
Dependent Claim
17 words
The electrode of claim 1 or 2, wherein the conductive body consists of a sheet of aluminium.
Claim 6
Dependent Claim
28 words
The electrode of claim 1 or 2, wherein the conductive body consists of consolidated particles of aluminium coated with an electroplated layer of lead or a lead alloy.
Claim 7
Dependent Claim
24 words
The electrode of claim 1 or 2, wherein an electrocatalytic material is applied to the surface of the bonded lead or lead alloy sheet.
Claim 8
Dependent Claim
16 words
The electrode of claim 6, wherein the electrocatalytic material consists of a surface-activated particulate valve metal.
Claim 9
Dependent Claim
13 words
The electrode of claim 7, wherein the particulate valve metal is flattened sponge.
Claim 10
Dependent Claim
12 words
The electrode of claim 1 or 2, which is a bipolar electrode.
Claim 11
Dependent Claim
41 words
The bipolar electrode of claim 9, wherein the lead or lead alloy sheet bonded onto the electroplated lead or lead alloy layer forms the anode side, and the conductive body forms the cathode side or is coated with a cathodic material.
Claim 12
Independent Claim
24 words
A method of electrowinning metals from a sulphuric acid containing electrolyte using as anode the electrode of any one of claims 1 or 2.
Claim 13
Dependent Claim
15 words
The method of claim 11, wherein the electrowon metal is zinc, copper, cobalt or nickel.
References Cited (Backward Citations)
US4380493A
Cited
US4373654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |