ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,839, issued on Aug. 19, was assigned to OMYA INTERNATIONAL AG (Oftringen, Switzerland).
"Coating formulation for a digital print medium" was invented by Jan Philipp Weihs (Dudingen, Switzerland) and Georg Hausler (Alberswil, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a cationic coating formulation, which contains beside water a specific anionic ultrafine ground calcium carbonate, a non-ionic polyvinyl alcohol, a water-soluble salt of a divalent metal ion, a dispersing agent and a cationic polymer. Said coating formulation according to the present invention can be used for manufacturing a digital print...