ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,412,941, issued on Sept. 9, was assigned to Duesenfeld GmbH (Wendeburg, Germany).
"Method for recycling lithium batteries" was invented by Christian Hanisch (Braunschweig, Germany), Tobias Elwert (Clausthal-Zellerfeld, Germany) and Lisa Bruckner (Clausthal-Zellerfeld, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for recycling lithium batteries containing the steps: (a) digesting comminuted material (10), which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid (12) at a digestion temperature (TA) of at least 100deg C., in particular at least 140deg C., so that waste gas (14) and a dig...