ALEXANDRIA, Va., March 31 -- United States Patent no. 12,592,399, issued on March 31, was assigned to AUDI AG (Ingolstadt, Germany).

"Bipolar plate having inclined inflow duct portions for a fuel cell stack, fuel cell system and motor vehicle" was invented by Oliver Keitsch (Heilbronn, Germany), Fabian Lippl (Mannheim, Germany), Armin Siebel (Neckarsulm, Germany) and Sebastian Voigt (Nienburg/Weser, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A bipolar plate for a fuel cell stack of a fuel cell system is described, having at least one main duct portion, which is designed for feeding a fluid (R1, R2, K); a plurality of inflow duct portions that branch off the main duct portion; a plurality of distr...