ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,190, issued on March 31, was assigned to SUMITOMO SEIKA CHEMICALS Co. LTD. (Kako-gun, Japan).
"Coated resin particles and method for producing coated resin particles" was invented by Hiroki Sawaki (Himeji, Japan) and Chiho Onita (Himeji, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "One aspect of the present invention relates to a coated resin particle including: a water-absorbent resin particle; and a coating layer that coats at least a part of a surface of the water-absorbent resin particle, in which the coating layer contains a water-soluble component in which a solubility in 100 g of water is in a range of 1.0 g or more and 150 g or less...