ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,344, issued on Sept. 23, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).

"Composite foils biodisintegratable at home compost conditions" was invented by Karl-Heinz Schumacher (Ludwigshafen am Rhein, Germany), Ulrike Licht (Ludwigshafen am Rhein, Germany), Ines Pietsch (Ludwigshafen am Rhein, Germany) and Lars Heckhoff (Ludwigshafen am Rhein, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The use of an aqueous polyurethane dispersion adhesive is described for producing composite foils which are biodisintegratable at home compost conditions where at least two substrates are adhesive-bonded to one another with use of the polyurethane...