US2860175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homeoporous gas-diffusion electrode for galvanic cells
Assignee: Ruhrchemie AG
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Filing: 1956-09-05
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Granted: 1958-11-11
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Expires: 1976-09-05
Abstract
No abstract record available.
Inventors
- 👤 Justi Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:11
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
93 words
PROCESS FOR THE PRODUCTION OF HOMEOPOROUS SINTERED BODIES SUCH AS GAS-DIFUSION ELECTRODES FOR FUEL CELLS, WHICH COMPRISES FORMING A SHAPED BODY OF FINELY DIVIDED PARTICLES SELECTED FRM THE GROUP CONSISTING OF GRAPHITE CARBON AND METAL BY DISTRIBUTING SAID PARTICLES AROUND PILES OF A PILE FABRIC HAVING AN AVERAGE THICHNESS BETWEEN 1-25U, 90% OF WHICH DO NOT DIVERGE DIRECTION BY MORE THAN 45* FROM THE SHORTEST PATH BETWEEN OPPOSED SURFACES OF THE BODY, CONVERTING THE PARTICLES INTO SOLID FORM BY AT LEAST ONE OF THE COMPRESSION AND SINTERING AND THEREAFTER ELIMINATING SAID PILE FABRIC.
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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |