Patent US2307983A successfully refreshed from Google Patents.
US3660166A
Expired / Lapsed
US
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Gas diffusion electrode
Assignee: Siemens AG
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Filing: 1967-03-14
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Granted: 1972-05-02
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Expires: 1987-03-14
Abstract
Abstract Catalytic electrode having improved heat dissipating means. The electrode embodies a foraminous metallic web having deposited over major portions of its surfaces porous catalytic material framed within gasket material and essentially having sufficient web surface exposed to effectively remove heat from the electrode during its operation in a fuel cell or other exothermic catalytic processes.
Inventors
- 👤 August Winsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:18
CPC Classifications
C; C25; C25B; C25B11/00; H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
The electrode of claim 1 in which the plate is metallic and both of its surfaces are at least partially covered by the catalytic material.
Claim 2
Dependent Claim
24 words
The electrode of claim 1 in which the plate is metallic and the catalytic material at least partially fills the openings of the plate.
Claim 3
Dependent Claim
32 words
The electrode of claim 1 in which the free portion of the plate is large enough to transfer essentially all of the heat produced in the neighborhood of the electrode away therefrom.
Claim 4
Dependent Claim
17 words
The electrode of claim 1 in which the gasket is electrically insulating and gas and liquid impermeable.
Claim 5
Dependent Claim
26 words
The electrode of claim 1 in which the plate is of one of the following: a porous, sintered metal powder, a metal screen, or a sieve.
Claim 6
Dependent Claim
29 words
The electrode of claim 1 in which the catalyst which the plate supports is compressed thereto and the gasket is of about the same thickness as said catalyst layer.
Claim 7
Dependent Claim
24 words
The electrode of claim 1 in which a portion of the plate within the inner borders of the gasket is free of catalytic material.
Claim 8
Dependent Claim
22 words
A fuel cell battery comprising a multiplicity of the electrodes of claim 1 electrically connected and arranged alternatingly as anodes and cathodes.
Claim 9
Dependent Claim
87 words
A gas-diffusion electrode comprising a heat-transferring foraminous plate, a catalytic material supported by said plate, and a gasket having an outer border said gasket being secured to said plate framing said catalytic material, said foraminous plate having an outer portion free of catalytic material which extends outwardly beyond the outer border of said gasket and a further inner portion of the foraminous plate within the confines of the outer border which is free of said catalytic material and is surrounded by the plate carrying the catalytic material.
Claim 10
Dependent Claim
20 words
The electrode of claim 10 and a further electrically insulating gasket framing said further inner free portion of said plate.
Claim 11
Dependent Claim
47 words
A fuel cell battery having at least a pair of the electrodes defined in claim 10 in which electrodes the respective inner portions, which are free of catalytic material communicate with each other forming connecting channels for circulation of the cooling medium for the fuel cell battery.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |