ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,504, issued on Feb. 3, was assigned to Canon K.K. (Tokyo).

"Particle, method for producing particle, affinity particle, and reagent and kit including the same" was invented by Sakae Suda (Kanagawa, Japan), Kazumichi Nakahama (Tokyo), Fumio Yamauchi (Kanagawa, Japan) and Kengo Kanazaki (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A particle includes a copolymer including a repeating unit A having, in a side chain, a sulfide group or a secondary amine, and three or more hydroxy groups, and a repeating unit B having, in a side chain, at least one reactive functional group for binding a ligand, in which nonspecific adsorption is suppre...