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Class Information
Number: 429/13
Name: Chemistry: electrical current producing apparatus, product, and process > Fuel cell, subcombination thereof or methods of operating > Process of operating
Description: Process of operating the apparatus.

Sub-classes under this class:

Class Number Class Name Patents
429/14 Circulating or feeding electrolyte 111
429/16 Fused or molten electrolyte 146
429/17 Generating, regenerating or recycling reactant 1,018

Patents under this class:

Patent Number Title Of Patent Date Issued
7147948 Method and apparatus for enhancing catalytic activity Dec. 12, 2006
7147946 Fuel cell system Dec. 12, 2006
7147945 System for determining a gas composition within a shut down fuel cell power plant and method of operation Dec. 12, 2006
7144645 Operation method for polymer electrolyte fuel cell Dec. 5, 2006
7144644 Mass flow metering air supply for a solid-oxide fuel cell stack Dec. 5, 2006
7141326 Warm-up apparatus for fuel cell Nov. 28, 2006
7141324 Hydrogen passivation shut down system for a fuel cell power plant Nov. 28, 2006
7141322 Alcohol fueled direct oxidation fuel cells Nov. 28, 2006
7141321 System and method for enabling the real time buying and selling of electricity generated by fuel cell powered vehicles Nov. 28, 2006
7138198 Ventilation apparatus for fuel cell system Nov. 21, 2006
7135245 Apparatus and method for stack temperature control Nov. 14, 2006
7132182 Method and apparatus for electrochemical compression and expansion of hydrogen in a fuel cell system Nov. 7, 2006
7132181 Method and apparatus for venting and purging of a fuel cell Nov. 7, 2006
7132180 Alkyl sorbitan emulsion compositions for fuel cell reformer start-up Nov. 7, 2006
7132179 Methods and apparatus for improving the cold starting capability of a fuel cell Nov. 7, 2006
7127937 Method for leak detection in gas feeding systems with redundant valves Oct. 31, 2006
7125618 Hydrogen supply system for a fuel cell Oct. 24, 2006
7125617 Method of operating phosphoric acid fuel cell Oct. 24, 2006
RE39348 Method of using a water transport plate Oct. 17, 2006
7122260 Method and system for improving efficiency of fuel cell in portable devices Oct. 17, 2006
7122259 Fuel cell startup method Oct. 17, 2006
7122258 Fuel cell air system and method Oct. 17, 2006
7122257 Fuel cell reactant supply Oct. 17, 2006
7112379 Vacuum assisted startup of a fuel cell at sub-freezing temperature Sep. 26, 2006
7112378 Apparatus and method for dynamic control of an enthalpy wheel in a fuel cell system Sep. 26, 2006
7108931 Fuel cell using non-linear positive temperature coefficient material Sep. 19, 2006
7108930 Fuel cells Sep. 19, 2006
7108929 Fuel and air flow control in a multi-stack fuel cell power plant Sep. 19, 2006
7108928 Warm-up of fuel cell power plant Sep. 19, 2006
7105242 Control of polymer surface distribution on diffusion media improved fuel cell performance Sep. 12, 2006
7106077 Device and method for testing a membrane electrode assembly Sep. 12, 2006
7094485 Method and apparatus for inspecting direct liquid fuel cell generator, and direct liquid fuel cell generator Aug. 22, 2006
7094486 Purge system for a fuel cell enclosure Aug. 22, 2006
7090939 Forming a layer on a flow plate of a fuel cell stack Aug. 15, 2006
7090940 Freeze tolerant fuel cell power plant with a direct contact heat exchanger Aug. 15, 2006
7090943 Regulating the communication of power to components of a fuel cell system Aug. 15, 2006
7087328 Fuel cell system and humidification method Aug. 8, 2006
7087329 Electric storage augmentation of fuel cell system transient response Aug. 8, 2006
7087330 Storing water in substrates for frozen, boot-strap start of fuel cells Aug. 8, 2006
7087334 Fuel cell operation method Aug. 8, 2006
7087335 H-infinity control with integrator compensation for anode pressure control in a fuel cell stack Aug. 8, 2006
7083017 Fuel cell vehicle Aug. 1, 2006
7081193 Multi-stack isolation detection system Jul. 25, 2006
7081310 Bipolar plate having integrated gas-permeable membrane Jul. 25, 2006
7078116 Method of warming up fuel cell system Jul. 18, 2006
7078117 Method for humidifying a reactant stream for a fuel cell Jul. 18, 2006
7078118 Performance enhancing break-in method for a PEM fuel cell Jul. 18, 2006
7074512 Method and installation for blowing out water in a fuel cell hydrogen circuit Jul. 11, 2006
7070873 Cooling method for fuel cell Jul. 4, 2006
7067208 Load matched power generation system including a solid oxide fuel cell and a heat pump and an optional turbine Jun. 27, 2006

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