ALEXANDRIA, Va., April 9 -- United States Patent no. 12,269,930, issued on April 8, was assigned to Mitsui Chemicals Inc. (Tokyo).
"Polyurethane dispersion" was invented by Chikako Kouda (Sodegaura, Japan), Kazuyuki Fukuda (Ichihara, Japan) and Takashi Uchida (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a polyurethane dispersion obtained by water-dispersing a polyurethane resin, the polyurethane resin is a reaction product obtained by reacting at least a polyisocyanate component with an active hydrogen group-containing component containing an active hydrogen compound having an anionic group, a ratio of the total moles of a urethane group and a urea group is 1.5 mol or more with respect to ...