US Patent No: 6,455,109
Number of patents in Portfolio can not be more than 2000
Electrode for fuel cell and method of producing the same
Stats
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Sep 24, 2002
Issued date -
Mar 30, 1999
filing date -
09/280,996
serial no -
In Force
status
Importance
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Abstract
A method of producing an electrode having a high performance in a simple and convenient manner which does not require the use of any of the medium, surfactant and pore-producing agent is disclosed. In the disclosed method, a layer including a catalyst powder is formed on a surface of a polymer electrolyte film or a porous conductive electrode substrate by supplying an electrostatically-charged catalyst powder to the polymer electrolyte film or the porous conductive electrode substrate. Alternatively, a layer including a catalyst powder is formed on a surface of a polymer electrolyte film or a porous conductive electrode substrate by spraying the catalyst powder on the surface of the polymer electrolyte film or the porous conductive electrode substrate together with a carrier gas, thereby to cause the catalyst powder to adhere to the surface.
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First Claim
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International Classification(s)
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Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,171,644 Electrochemical cell electrode | 20 | 1991 | |
| 5,151,515 Oxygen reduction catalyst based upon metal dipyridylamines | 12 | 1991 | |
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| 4,272,353 Method of making solid polymer electrolyte catalytic electrodes and electrodes made thereby | 58 | 1980 | |
| 4,313,972 Dry method for making an electrochemical cell electrode | 44 | 1980 | |
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| 5,738,905 Process for the production of a composite comprising electrode material, catalyst material and a solid-electrolyte membrane | 12 | 1996 | |
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| 5,316,871 Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby | 112 | 1993 | |
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| 4,489,122 Transparencies for electrostatic printing | 18 | 1982 | |
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| 5,372,896 Treated solid polymer electrolyte membrane for use in a fuel cell and fuel cell including the treated solid polymer electrolyte membrane | 17 | 1993 | |
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| 5,542,163 Electrically-conducting adhesion-promoter | 13 | 1994 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 24, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
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| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
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