Serially-linked serpentine flow channels for PEM fuel cell
Patent 6309773 Issued on October 30, 2001. Estimated Expiration Date: 
December 13, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 13, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNovel fuel cell fluid flow field plate Edge manifold assembly for an electrochemical fuel cell stack Mirrored serpentine flow channels for fuel cell Patent #: 6099984 InventorAssigneeApplicationNo. 459592 filed on 12/13/1999US Classes:429/34, Housing member, seal, spacer or fluid distributing or directing means429/30Solid electrolyteExaminersPrimary: Brouillette, GabrielleAssistant: Wills, Monique Attorney, Agent or FirmForeign Patent References
International ClassH01M 008/02AbstractA PEM fuel cell having serpentine flow field channels comprising a plurality of serially-linked serpentine segments extending between inlet and exhaust manifolds. Each segment has an inlet leg, an exit leg, at least one medial leg therebetween and hairpin curved ends connecting the medial leg(s) to other legs of the segment. A bridging section of each flow channel connects adjacent segments of the same channel one to the next. The hairpin-curved ends of the medial legs are spaced from bridging sections by different distances depending on the difference in pressure in the bridging section and the hairpin-curved ends.Other References
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