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| Number | Title | Issue Date |
| 5795669 | Electrode An electrode comprises a first catalytic component active at gas-phase reaction sites and a second catalytic component active at electrochemical reaction sites wherein each catalytic component is present either as a separate layer, or a single mixed layer... | 08/18/1998 |
| 5527363 | Method of fabricating an embossed fluid flow field plate An embossed fluid flow field plate for electrochemical cells comprises two sheets of compressible, electrically conductive material. Each sheet has two oppositely facing major surfaces. At least one of the major surfaces has an embossed surface which has ... | 06/18/1996 |
| 5521018 | Embossed fluid flow field plate for electrochemical fuel cells An embossed fluid flow field plate for electrochemical cells comprises two sheets of compressible, electrically conductive material. Each sheet has two oppositely facing major surfaces. At least one of the major surfaces has an embossed surface which has ... | 05/28/1996 |
| 5518705 | Method and apparatus for the two-stage selective oxidation of carbon monoxide in a hydrogen-containing gas mixture An apparatus and method are provided for the two-stage selective oxidation of carbon monoxide to carbon dioxide in a fuel stream comprising hydrogen and carbon monoxide. The apparatus includes primary and secondary reaction chambers, which deliver a hydro... | 05/21/1996 |
| 5514487 | Edge manifold assembly for an electrochemical fuel cell stack An edge manifold assembly conducts, introduces and receives reactant and coolant streams to and from an electrochemical fuel cell stack. The assembly comprises a plurality of manifold plates. Each of the fuel cells has a pair of manifold plates attached t... | 05/07/1996 |
| 5498639 | Trifluorostyrene and substituted trifluorostyrene copolymeric ion-exchange membranes Polymeric compositions are derived from copolymers of ,ଲ, ଲ-trifluorostyrene with a variety of substituted ,ଲ,ଲ-trifluorostyrenes. These compositions are suitable for use as membranes, particularly as ion-exchange mem... | 03/12/1996 |
| 5486430 | Internal fluid manifold assembly for an electrochemical fuel cell stack array A fluid manifold assembly for an array of electrochemical fuel cell stacks has a substantially fluid impermeable housing. Inlet passages are formed within the housing for introducing at least one inlet fluid stream to each of the fuel cell stacks. Outlet ... | 01/23/1996 |
| 5484666 | Electrochemical fuel cell stack with compression mechanism extending through interior manifold headers An electrochemical fuel cell stack has a first end plate, a second end plate, and fuel cell assemblies interposed therebetween. Each fuel cell assembly includes a membrane electrode assembly having at least one manifold header opening formed in the assemb... | 01/16/1996 |
| 5484577 | Catalytic hydrocarbon reformer with enhanced internal heat transfer mechanism A catalytic hydrocarbon reformer operates at lower temperature and pressure relative to conventional reformers. Convective heat transfer between the hot combustion gas stream and the reactor tube is enhanced through use of a narrow gap heat transfer area,... | 01/16/1996 |
| 5482680 | Electrochemical fuel cell assembly with integral selective oxidizer A method and apparatus selectively oxidizes, within the fuel cell assembly, the carbon monoxide present in a fuel stream fed to the assembly. A quantity of catalyst is contained within at least a portion of a fuel stream passageway within the stack. The c... | 01/09/1996 |
| 5470671 | Electrochemical fuel cell employing ambient air as the oxidant and coolant An electrochemical fuel cell assembly includes a membrane electrode assembly which comprises an anode, a cathode having a surface thereof exposed to ambient air, and an ion exchange membrane interposed between the anode and the cathode. A seal forms a gas... | 11/28/1995 |
| 5464606 | Two-stage water gas shift conversion method A method and apparatus are provided for reducing the concentration of carbon monoxide in a gaseous reactant stream comprising carbon monoxide and water vapor. The catalyst bed of a water gas shift reactor is preferably divided into two sections. Alternati... | 11/07/1995 |
| 5464700 | Gasketed membrane electrode assembly for electrochemical fuel cells A gasketed membrane electrode assembly for electrochemical fuel cells employs gasketing material at the periphery of the ion exchange membrane, rather than the membrane itself, as a gasket. The gasketing material may be formed from an elastomeric material... | 11/07/1995 |
| 5441819 | Method and apparatus for removing water from electrochemical fuel cells by controlling the temperature and pressure of the reactant streams A method and apparatus is provided for removing water accumulated at the cathode of an electrochemical fuel cell incorporating a solid polymer ion exchange membrane. Liquid water accumulated at the cathode can be removed by maintaining a partial pressure ... | 08/15/1995 |
| 5432021 | Method and apparatus for oxidizing carbon monoxide in the reactant stream of an electrochemical fuel cell A method and apparatus oxidizes the carbon monoxide present in an incoming reactant fuel stream and/or carbon monoxide produced by the reverse water-shift reaction to carbon dioxide in a reactant stream introduced to an electrochemical fuel cell. The reac... | 07/11/1995 |
| 5382478 | Electrochemical fuel cell stack with humidification section located upstream from the electrochemically active section An electrochemical fuel cell stack has a humidification section located upstream from the electrochemically active section. The inlet fuel and oxidant streams are introduced into the humidification section without first being directed through the electroc... | 01/17/1995 |
| 5366821 | Constant voltage fuel cell with improved reactant supply and control system A method and apparatus for providing a substantially constant output voltage from a fuel cell, notwithstanding output current variations, is disclosed. The voltage and secondarily the current of the cell is determined at least periodically. The pressure o... | 11/22/1994 |
| 5366818 | Solid polymer fuel cell systems incorporating water removal at the anode A solid polymer fuel cell electric power generation system removes a substantial portion of water accumulated at the cathode in the outlet fuel stream of the anode. The system permits the operation of a hydrogen/oxygen fuel cell in a dead-ended mode where... | 11/22/1994 |
| 5360679 | Hydrocarbon fueled solid polymer fuel cell electric power generation system A power plant system produces utility grade electrical AC power from gaseous or liquid hydrocarbon fuels using a fuel cell stack employing ion exchange membranes. The fuel is desulfurized, mixed with water, heated and vaporized before being introduced int... | 11/01/1994 |
| 5316747 | Method and apparatus for the selective oxidation of carbon monoxide in a hydrogen-containing gas mixture A method and apparatus for selectively oxidizing the carbon monoxide present in a mixture of gases, including hydrogen, to carbon dioxide is disclosed. Oxygen or an oxygen-containing gas mixture is introduced at locations along the latter portion of the r... | 05/31/1994 |
| 5300370 | Laminated fluid flow field assembly for electrochemical fuel cells A laminated fluid flow field assembly for an electrochemical fuel cell comprises a separator layer and a stencil layer. The separator layer is formed of electrically conductive, substantially fluid impermeable sheet material. The stencil layer is formed o... | 04/05/1994 |
| 5260143 | Method and apparatus for removing water from electrochemical fuel cells A method and apparatus is provided for removing water accumulated at the cathode of an electrochemical fuel cell incorporating a solid polymer ion exchange membrane. Liquid water accumulated at the cathode can be removed by maintaining a partial pressure ... | 11/09/1993 |
| 5252410 | Lightweight fuel cell membrane electrode assembly with integral reactant flow passages An electrochemical fuel cell is provided for converting a fuel reactant stream and an oxidant reactant stream to a reaction product stream and electrical energy. The fuel cell includes a membrane electrode assembly interposed between two separator layers.... | 10/12/1993 |
| 5230966 | Coolant flow field plate for electrochemical fuel cells A coolant flow field plate for use in association with a solid polymer fuel cell comprises, in a major surface, a coolant inlet, a coolant outlet, at least one coolant distribution channel in fluid communication with the coolant inlet and disposed near th... | 07/27/1993 |
| 5200278 | Integrated fuel cell power generation system An integrated fuel cell power generation system comprises a fuel cell stack having a humidification section and an electrochemically active section. The humidification section imparts water vapor to an inlet hydrogen containing fuel stream and an inlet ox... | 04/06/1993 |
| 5176966 | Fuel cell membrane electrode and seal assembly A fully supported membrane assembly for an electrochemical fuel cell is provided. A first and second layer of porous electrically conductive sheet material, such as carbon filter paper, has a solid polymer ion exchange membrane interposed therebetween. Th... | 01/05/1993 |
