US Patent Issued to Hyster-Yale Group on April 7 for "Closed loop control for fuel cell water management" (Oregon, California Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,597,621, issued on April 7, was assigned to Hyster-Yale Group Inc. (Fairview, Ore.).

"Closed loop control for fuel cell water management" was invented by Nicholas M. Draayer (Portland, Ore.), Edmund Stilwell (Oregon City, Ore.) and Eugene Wong (Berkeley, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for maintaining a target electrochemical impedance (ECI) for a fuel cell, which corresponds to a target hydration state for the fuel cell. The method includes determining a target electrochemical impedance (ECI) for the fuel cell based on current operating conditions. The method further includes determining actual ECI for the fuel cell and c...