ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,489, issued on May 20, was assigned to Robert Bosch GmbH (Stuttgart, Germany).
"Method for operating a fuel cell system and control device" was invented by Ingo Brauer (Vaihingen, Germany), Felix Guenther (Stuttgart, Germany) and Michael Schmidt (Weinstadt, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for operating a fuel cell system (1), in particular a PEM fuel cell system, in which at least one fuel cell (2) is supplied with a hydrogen-containing anode gas via an anode gas path (3) and anode gas exiting the fuel cell (2) is returned via a recirculation path (4), wherein, in order to reduce a nitrogen co...