US3791872A
Expired / Lapsed
US
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Method for production of electrode for electrochemical cells
Assignee: Siemens AG
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Filing: 1971-06-30
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Granted: 1974-02-12
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Expires: 1991-06-30
Abstract
Abstract An electrode for electrochemical cells constituting a porous cover layer of fibrous material and a layer of pulverulent catalyst. The catalyst particles are connected with each other as well as with the cover layer by means of a binder. The cover layer contains a binder. A butadienestyrene acrylonitrile copolymer is present in the catalyst layer. Also described is a method for producing the electrode.
Inventors
- 👤 F Sturm
- 👤 D Groppel
- 👤 W Naschwitz
- 👤 W Rummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:43
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/30; H; H01; H01M; H01M4/00; H01M4/86; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/10; B32B2262/101; B32B2262/106; B32B2355/00; B32B2355/02; B32B2457/00; B32B2457/18; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
The method of claim 1, wherein the fibrous material of the cover layer is asbestos.
Claim 2
Dependent Claim
23 words
The method of claim 1, wherein a filler is added to the suspension and is leached out following the production of the electrode.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein the butadienestyreneacrylonitrile copolymer present in the cover layer, is cross-linked together with the copolymer which is contained in the catalyst layer.
Claim 4
Dependent Claim
26 words
The method of claim 1, wherein the nitrile groups present in the copolymer of catalyst layer and cover layer are saponified together to form carboxyl groups.
Claim 5
Dependent Claim
28 words
The method of claim 1, wherein the amount of the copolymer in the mixture of the catalyst and the copolymer is 2 percent by weight of the catalyst.
Claim 6
Dependent Claim
13 words
The method of claim 1, wherein a lubricant is added to the suspension.
Claim 7
Dependent Claim
19 words
The method of claim 7, wherein, following the production of the electrode, the lubricant is leached out by water.
Claim 8
Dependent Claim
26 words
The method of claim 1, wherein the butadienestyreneacrylonitrile copolymer contained in the cover layer is cross-linked per se immediately following the production of the cover layer.
Claim 9
Dependent Claim
32 words
The method of claim 9, wherein the nitrile groups present in the copolymer of the cover layer are saponified into carboxyl groups, following the cross-linking of the copolymer of the cover layer.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |