US3235473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing fuel cell electrodes
Assignee: Pullman Inc
•
Filing: 1961-12-26
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Granted: 1966-02-15
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Duc Joseph Adrien M Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:29
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8803; H01M4/8807; C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42; C23C18/44; H01M4/8825; H01M4/8846; H01M4/885; H01M4/8853; H01M4/8878; H01M4/8892; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A PROCESS FOR MAKING A FLUID DIFFUSION ELECTRODE FOR USE IN A FUEL CELL WHICH COMPRISES CONTACTING A POROUS AND NON-METALLIC SOLID IN THE FORM OF A CONTINUOUS MEMBER WITH A REDUCING AGENT, CONTACTING SAID SOLID HAVING SAID REDUCING AGENT THEREON WITH A SOLUTION OF A COMPOUND OF A READILY REDUCIBLE METAL SUCH THAT SAID REDUCIBLE METAL IS CONVERTED TO ELEMENTAL METAL ON THE SURFACE OF SAID SOLID, CONTACTING SAID SOLID HAVING SAID ELEMENTAL METAL THEREON WITH AN ELECTROLESS PLATING BATH COMPRISING A SALT OF AN ELECTROCONDUCTIVE METAL, FLASH PLATING SAID ELECTROCONDUCTIVE METAL ON THE SURFACE OF SAID SOLID AND ELECTROPLATING SAID FLASH PLATED SOLID TO DEPOSIT ELECTROCONDUCTIVE METAL THEREON, SAID ELECTRODE HAVING A CONTINUOUS LAYER OF ELECTROCONDUCTIVE METAL ON THE SURFACE OF AND WITHIN THE PORES OF SAID SOLID AND HAVING RESISTIVITY COMPARABLE TO THAT OF A SOLID CONDUCTOR COMPOSED OF THE ELECTROCONDUCTIVE METAL WHICH IS ELECTROPLATED.
Claim 2
Dependent Claim
148 words
A PROCESS FOR MAKING A FLUID DIFFUSION ELECTRODE FOR USE IN A FUEL CELL WHICH COMPRISES CONTACTING A POROUS AND NON-METALLIC SOLID IN THE FORM OF A CONTINUOUS MEMBER WITH A REDUCING AGENT, CONTACTING SAID SOLID HAVING SAID REDUCING AGENT THEREON WITH A SOLUTION OF A COMPOUND OF A READILY REDUCIBLE METAL SUCH THAT SAID REDUCIBLE METAL IS CONVERTED TO ELEMENTAL METAL ON THE SURFACE OF SAID SOLID, CONTACTING SAID SOLID HAVING SAID ELEMENTAL METAL THEREON WITH AN ELECTROLESS PLATING BATH COMPRISING A SALT OF AN ELECTROCONDUCTIVE METAL, FLASH PLATING SAID ELECTROCONDUCTIVE METAL ON THE SURFACE OF SAID SOLID AND ELECTROPLATING SAID FLASH PLATED SOLID TO DEPOSIT ELECTROCONDUCTIVE METAL THEREON, SAID ELECTRODE HAVING A CONTINUOUS LAYER OF ELECTROCONDUCTIVE METAL ON THE SURFACE OF AND WITHIN THE PORES OF SAID SOLID AND HAVING RESISTIVITY COMPARABLE TO THAT OF A SOLID CONDUCTOR COMPOSED OF THE ELECTROCONDUCTIVE METAL WHICH IS ELECTROPLATED.
References Cited (Backward Citations)
CA496463A
Cited
GB199736A
Cited
GB572071A
Cited
US2474502A
Cited
US2737541A
Cited
US2678343A
Cited
US2805274A
Cited
US2728693A
Cited
GB830922A
Cited
US2834724A
Cited
US2947797A
Cited
US2967805A
Cited
US2977401A
Cited
US3116170A
Cited
US3134697A
Cited
US3099608A
Cited
US3117034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |