Patent US3433945A successfully refreshed from Google Patents.
Patent US3857774A successfully refreshed from Google Patents.
US3857774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathodes for electrolytic cell
Assignee: Imperial Metal Industries Kynoch Ltd
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Filing: 1973-06-25
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Granted: 1974-12-31
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Expires: 1993-06-25
Abstract
Abstract A cell structure in which the cathode working surface is formed of titanium and the hanger bar is formed of copper-cored titanium, the working surface being welded to the titanium sheath of the hanger bar.
Inventors
- 👤 P Morton
- 👤 J Wortley
- 👤 A Woolcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:12
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
55 words
AN ELECTROLYTIC CELL INCLUDING AN ANODE AND A CATHODE, THE CATHODE COMPRISING A HANGER BARR OF ALUMINIUM OR COPPER AT LEAST PARTLY SHEATHED WITH A VALVE METAL, AND A CONTINUOUS SHEET OF VALVE METAL WELDED ALONG ONE EDGE ONLY TO AT LEAST PART OF THE LENGTH OF THE VALVE METAL SHEATH OF THE HANGER BAR.
Claim 2
Dependent Claim
55 words
AN ELECTROLYTIC CELL INCLUDING AN ANODE AND A CATHODE, THE CATHODE COMPRISING A HANGER BARR OF ALUMINIUM OR COPPER AT LEAST PARTLY SHEATHED WITH A VALVE METAL, AND A CONTINUOUS SHEET OF VALVE METAL WELDED ALONG ONE EDGE ONLY TO AT LEAST PART OF THE LENGTH OF THE VALVE METAL SHEATH OF THE HANGER BAR.
Claim 3
Dependent Claim
15 words
The cell of claim 1 wherein said hanger bar is completely sheathed with valve metal.
Claim 4
Dependent Claim
28 words
The cell of claim 1 wherein said edge is in the form of cranked legs, said legs being welded to said valve metal sheath of the hanger bar.
Claim 5
Dependent Claim
10 words
The cell of claim 3 wherein said legs are staggered.
Claim 6
Dependent Claim
11 words
The cell of claim 1 wherein said legs are spaced apart.
Claim 7
Dependent Claim
20 words
The cell of claim 1 wherein said edge is spot welded to said valve metal sheath of the hanger bar.
Claim 8
Dependent Claim
19 words
The cell of claim 1 wherein said cell is an electrowinning cell and the anode is a non-consumable anode.
Claim 9
Dependent Claim
19 words
The cell of claim 1 wherein said cell is an electrorefining cell and the anode is a consumable anode.
Claim 10
Dependent Claim
37 words
The cell of claim 1 wherein said hanger bar is located at at least one end on an electrical bus-bar, the hanger bar having the valve metal sheath relieved at the point of contact with the bus-bar.
Claim 11
Dependent Claim
12 words
The cell of claim 8 wherein there is a plurality of cathodes.
Claim 12
Dependent Claim
12 words
The cell of claim 9 wherein there is a plurality of cathodes.
Claim 13
Dependent Claim
17 words
The cell of claim 1 wherein the continuous sheet of valve metal is free from precious metal.
Claim 14
Dependent Claim
30 words
The cell of claim 1 wherein said hanger bar is produced by coextruding at an elevated temperature a copper or aluminium core and a valve metal sheath or part sheath.
Claim 15
Dependent Claim
11 words
The cell of claim 1 wherein said valve metal is titanium.
Claim 16
Dependent Claim
28 words
The cell of claim 13 wherein during said extrusion stage the valve metal is surrounded by lubricant metal, the lubricant metal being removed subsequent to the extrusion stage.
Claim 17
Dependent Claim
11 words
The cell of claim 15 wherein said lubricant material is copper.
Claim 18
Dependent Claim
12 words
The cell of claim 1 wherein said hanger bar includes strengthening means.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |