US Patent No: 6,998,149

Number of patents in Portfolio can not be more than 2000

Process for producing a membrane electrode assembly for fuel cells

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ALSO PUBLISHED AS: 20020064593
ATTORNEY / AGENT: (SPONSORED)
 

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Abstract

A process for producing a membrane electrode assembly for fuel cells containing a polymer electrolyte membrane having a first and a second surface parallel to each other. The first surface forms a firm composite with a first catalyst layer and a first water repellent gas distribution layer and said second surface form a firm composite with a second catalyst layer and a second water repellent gas distribution layer. The catalyst layers are prepared by using inks containing electrocatalysts, one or more solvents, proton-conducting ionomer and optionally water repelling agents and pore-forming agents. In the process the two catalyst layers are applied to or contacted with the respective surfaces of the polymer electrolyte membrane successively, wherein during the application or contacting process to one surface always the opposite surface of the membrane is supported.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
UMICORE AG & CO. KGHANAU-WOLFGANG281

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Diehl, Manfred Frankfurt, DE 19 197
Kohler, Joachim Burchköbel, DE 12 96
Starz, Karl-Anton Rodenbach, DE 29 359
Wittpahl, Sandra Obertshausen, DE 19 56

Cited Art

Patent Info (Count) # Cites Year
 
UMICORE AG & CO. KG (2)
5,861,222 Gas diffusion electrode for membrane fuel cells and method of its production 40 1997
6,156,449 Catalyst layer for polymer electrolyte fuel cells 24 1999
 
DEUTSCHE FORSCHUNGSANSTALT FUR LUFT-UND RAUMFAHRT E.V. (1)
5,761,793 Process for the production of a composite consisting of electrode material, catalyst material and a solid-electrolyte membrane 23 1996
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
6,645,336 Extrusion coating process 6 2000
 
ENERGY, UNITED STATES DEPARTMENT OF (1)
4,876,115 Electrode assembly for use in a solid polymer electrolyte fuel cell 157 1988
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
6,074,692 Method of making MEA for PEM/SPE fuel cell 34 1998
 
RELION, INC. (DOING BUSINESS AS AVISTA LABS) (1)
6,383,556 Method for forming a membrane electrode diffusion assembly for use in an ion exchange membrane fuel cell 5 2001
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
6,015,635 Electrode for fuel cell and method of manufacturing electrode for fuel cell 14 1998

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CABOT CORPORATION (1)
7,713,899 Method of producing membrane electrode assemblies for use in proton exchange membrane and direct methanol fuel cells 5 2006
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
7,316,794 Continuous production of catalyst coated membranes 2 2002
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
7,414,004 Gas diffusion layer, electrode and membrane electrode assembly for fuel cell, and production methods thereof 0 2004
 
MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN E.V. (1)
8,164,881 Porous carbon electrode with conductive polymer coating 2 2007
 
SOUTHWEST RESEARCH INSTITUTE (1)
7,968,488 Two-dimensional composite particle adapted for use as a catalyst and method of making same 1 2007
 
UMICORE AG & CO. KG (1)
7,285,307 Process for producing catalyst-coated membranes and membrane-electrode assemblies for fuel cells 1 2003

Maintenance Fees

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7.5 Year Payment $3600.00 $1800.00 $900.00 Aug 14, 2013
11.5 Year Payment $7400.00 $3700.00 $1850.00 Aug 14, 2017
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Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
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Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00