US3404038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell, particularly fuel cell, and gas-diffusion electrodes therefor
Assignee: Siemens AG
•
Filing: 1962-08-27
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Granted: 1968-10-01
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Winsel August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:12
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/8605; B; B41; B41N; B41N10/00; H01M8/00; H01M8/02; H01M8/0271; H01M8/24; H01M8/2457; H01M8/2459; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A GAS DIFFUSION ELECTRODE FOR ELECTRO-CHEMICAL CELLS, COMPRISING AN ELECTRODE BODY HAVING A COARSE-POROUS AND GAS-PERMEABLE INNER LAYER AND HAVING FINE-POROUS COVER LAYERS JOINED WITH SAID INNER LAYER AND FORMING RESPECTIVE OPPOSITE ELECTRODE SURFACES TO BE CONTACTED BY ELECTROLYTE, SAID BODY HAVING OPENINGS TRAVERSING SAID BODY FROM ONE TO THE OTHER ELECTRODE SURFACE, SEALING MEANS ON THE WALL OF SAID OPENING FOR HERMETICALLY SEALING SAID OPENING, SAID SEALING MEANS HAVING AN OPENING AT THE LOCATION OF SAID GAS-PERMEABLE COARSE INNER LAYER.
Claim 2
Dependent Claim
81 words
A GAS DIFFUSION ELECTRODE FOR ELECTRO-CHEMICAL CELLS, COMPRISING AN ELECTRODE BODY HAVING A COARSE-POROUS AND GAS-PERMEABLE INNER LAYER AND HAVING FINE-POROUS COVER LAYERS JOINED WITH SAID INNER LAYER AND FORMING RESPECTIVE OPPOSITE ELECTRODE SURFACES TO BE CONTACTED BY ELECTROLYTE, SAID BODY HAVING OPENINGS TRAVERSING SAID BODY FROM ONE TO THE OTHER ELECTRODE SURFACE, SEALING MEANS ON THE WALL OF SAID OPENING FOR HERMETICALLY SEALING SAID OPENING, SAID SEALING MEANS HAVING AN OPENING AT THE LOCATION OF SAID GAS-PERMEABLE COARSE INNER LAYER.
References Cited (Backward Citations)
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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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |