US Patent No: 6,686,082
Number of patents in Portfolio can not be more than 2000
Fuel cell stack
Stats
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Feb 3, 2004
Issued date -
Dec 6, 2001
filing date -
10/013,405
serial no -
In Force
status
Importance
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Abstract
A fuel cell stack comprises fuel cell basic units, each of which including a gas diffuser/collector plate serving as an anode, an ion exchange membrane, disposed on top of the gas diffuser/collector plate and an air diffuser/collector plate serving as a cathode and disposed on top of the ion exchange membrane. The gas diffuser/collector has a face directed to the ion exchange membrane. This face is provided with a flow field incorporating a multiplicity of adjacent open-faced flow channels. Each open-faced flow channel has a cross-section continuously diminishing from its inlet to its outlet. The flow field, viewed from the top, forms a trapezoidal contour.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,804,326 Integrated reactant and coolant fluid flow field layer for an electrochemical fuel cell | 35 | 1996 | |
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| 6,099,984 Mirrored serpentine flow channels for fuel cell | 64 | 1998 | |
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| 6,048,633 Fuel cell stack | 34 | 1998 | |
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| 5,879,826 Proton exchange membrane fuel cell | 33 | 1996 | |
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| 5,686,199 Flow field plate for use in a proton exchange membrane fuel cell | 50 | 1996 | |
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| 6,468,685 Separator for a fuel cell | 10 | 2000 | |
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| 5,981,098 Fluid flow plate for decreased density of fuel cell assembly | 57 | 1997 | |
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| 6,080,502 Fluid-cooled fuel cell with distribution ducts | 23 | 1998 | |
Patent Citation Ranking
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| 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 | Aug 3, 2015 |
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