ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,559, issued on Sept. 9, was assigned to BILLERUDKORSNAS AB (Solna, Sweden).
"Production method" was invented by Johan Magnusson (Frovi, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a method of producing a highly refined pulp, comprising the steps of: providing a pulp; subjecting the pulp to a first conical refining step in at least one conical refiner comprising refining plates having a bar width of 0.5-1.5 mm, such as about 1.0 mm, and a groove width of 1.0-2.0 mm, such as 1.4-2.0 mm, such as about 1.6 mm; and subjecting the pulp from the first conical refining step to a second conical refining step in at least one conic...