Patent US3793084A successfully refreshed from Google Patents.
US3793084A
Expired / Lapsed
US
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Electrode for electrochemical cells with graduated catalyst concentration
Assignee: Siemens AG
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Filing: 1971-07-29
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Granted: 1974-02-19
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Expires: 1991-07-29
Abstract
Abstract An electrode, for electrochemical cells, with pulverulent catalyst material and a porous cover layer of fibrous material. The electrode comprises a layer of fibrous material with two sequential semilayers. One of the semilayers comprises fibrous material only and the other of the semilayers comprises fibrous material and pulverulent catalyst. Also described is a method of forming the electrode.
Inventors
- 👤 M Marchetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:33
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
The electrode of claim 1, wherein the fibrous material is asbestos.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |