ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,769, issued on Feb. 10, was assigned to Covestro Deutschland AG (Leverkusen, Germany).
"Multilayer composites of printed films" was invented by Joerg Buechner (Bergisch Gladbach, Germany), Harald Kraus (Leverkusen, Germany), Thomas Fait (Cologne, Germany) and Christoph Thiebes (Cologne, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a multilayer composite, containing a first polymeric layer which on a side is coated with a printing ink containing a polyurethane as binder, and a second layer which with a polyurethane dispersion as adhesive is joined at least partly with the side of the first polymeric layer which is c...