US4278568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing sheet metal elements or strip having a catalytic surface structure
Assignee: GEA Group AG
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Filing: 1979-06-19
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Granted: 1981-07-14
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Expires: 1999-06-19
Abstract
Abstract In the manufacture of sheet metal elements or strip having a catalytic surface structure, a mixture of skeleton material powder, and of Raney alloy powder is rolled onto the starting sheet metal element or strip substrate, sintered in a reducing atmosphere, whereafter the soluble component of the Raney alloy is dissolved out. To ensure an adequate adherence of the catalytic surface structure, the operation in which the above-mentioned mixture is rolled onto the substrate is accompanied by a simultaneous cold-working of the substrate with a deformation of 20 to 60% within each cold-forming step. The coated sheet metal element or strip substrates or any spherical bodies made therefrom serve as electrodes in electrolytic processes.
Inventors
- 👤 Karl Lohrberg
- 👤 Heinz Wullenweber
- 👤 Jurgen Muller
- 👤 Bernd Sermond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:56
CPC Classifications
B; B01; B01J; B01J25/00; B01J35/00; B01J35/50; B01J35/58; B01J37/00; B01J37/02; B01J37/0215; B01J37/0225; C; C25; C25B; C25B11/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
In a process for manufacturing a sheet metal element or strip having a catalytic surface structure wherein a mixture comprising a skeleton powder and Raney alloy powder in a ratio of 1:3 to 3:1 is applied to a sheet or strip, bonded thereto by a roll of cladding, sintered in a reducing atmosphere at a temperature above 600° C. and treated with an alkaline or acid solution to dissolve out the soluble component of the Raney alloy the improvement wherein said sheet metal element or strip is cold-formed during said process with a deformation of 20 to 60% in any one forming step.
Claim 2
Dependent Claim
103 words
In a process for manufacturing a sheet metal element or strip having a catalytic surface structure wherein a mixture comprising a skeleton powder and Raney alloy powder in a ratio of 1:3 to 3:1 is applied to a sheet or strip, bonded thereto by a roll of cladding, sintered in a reducing atmosphere at a temperature above 600° C. and treated with an alkaline or acid solution to dissolve out the soluble component of the Raney alloy the improvement wherein said sheet metal element or strip is cold-formed during said process with a deformation of 20 to 60% in any one forming step.
Claim 3
Dependent Claim
20 words
A process according to claim 1 wherein said starting sheet or strip is one comprising iron, steel, copper, or nickel.
Claim 4
Dependent Claim
15 words
A process according to claim 1 wherein said skeleton powder comprises iron, nickel or cobalt.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein said Raney alloy comprises iron, nickel, cobalt or silver-base Raney alloy.
Claim 6
Dependent Claim
40 words
A process according to claim 1 wherein said mixture of skeleton powder and Raney alloy powder is applied in such a quantity that the catalytic surface structure of the finished product has as a thickness of 10 to 300 microns.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein said cold-forming is carried out in a plurality of steps.
Claim 8
Dependent Claim
15 words
A process according to claim 6 wherein said cold-forming is carried out in two steps.
Claim 9
Dependent Claim
31 words
A process according to claim 1 wherein a plurality of cold-forming steps is employed and between any two consecutive cold-forming steps an interstage annealing treatment is performed in a reducing atmosphere.
Claim 10
Dependent Claim
20 words
A process according to claim 1 wherein said sintering is effected at a temperature of between 600° and 1000° C.
Claim 11
Dependent Claim
19 words
A process according to claim 9 wherein the sintering is effected at a temperature between 700° and 800° C.
Claim 12
Dependent Claim
9 words
An electrode formed by the process of claim 1.
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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |