ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,190, issued on Jan. 20, was assigned to Stora Enso OYJ (Helsinki).
"Coating composition for paper and paperboard" was invented by Tuula Sokka (Imatra, Finland) and Kaj Backfolk (Lappeenranta, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a coating composition for coating of paper or paperboard, said composition comprising: a pigment, a binder, an optical brightening agent (OBA), a colorant, and a sugar alcohol, and to paper or paperboard coated with at least one layer of the coating composition. The present invention further relates to a method for preparing said coating composition and to an OBA premix usef...