US4091175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air electrode for electrochemical cells
Assignee: Siemens AG
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Filing: 1976-11-04
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Granted: 1978-05-23
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Expires: 1996-11-04
Abstract
Abstract An air electrode for electrochemical cells, particularly for fuel cells with an alkaline electrolyte, which contains silver coated carbon as the catalytic material in which the catalytic material also contains nickel hydroxide, the nickel content being up to about 2% by weight, with the weight ratio of silver to carbon preferably about 1:1.
Inventors
- 👤 Karl Hohne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:23
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
In an air electrode for electrochemical cells containing silver coated carbon as a catalytic material the improvement comprising: the catalytic material also containing nickel hydroxide with the nickel content being up to about 2% by weight and the weight ratio of silver to carbon in said catalytic material about 1:1.
Claim 2
Dependent Claim
50 words
In an air electrode for electrochemical cells containing silver coated carbon as a catalytic material the improvement comprising: the catalytic material also containing nickel hydroxide with the nickel content being up to about 2% by weight and the weight ratio of silver to carbon in said catalytic material about 1:1.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |