ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,738,524, issued on Sept. 15, was assigned to AUDI AG (Ingolstadt, Germany).

"Fuel cell stack having casting material and method for producing a fuel cell stack" was invented by Oliver Keitsch (Heilbronn, Germany), Armin Siebel (Neckarsulm, Germany) and Sebastian Voigt (Heilbronn, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fuel cell stack comprises a cell series composed of multiple unit cells, being formed with internal media guides in the cell, and contained between two clamped together end plates in a fuel cell stack housing. The cell series present in the fuel cell stack housing is embedded entirely in an electrically insulating castin...