ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,597, issued on Feb. 24, was assigned to TORAY INDUSTRIES Inc. (Tokyo).
"Polyamide fine particles and method of producing the same" was invented by Ken Komiya (Aichi, Japan), Akiyoshi Tamai (Aichi, Japan) and Kenichi Utazaki (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Polyamide fine particles include a polymer or a copolymer including a repeating structure unit represented by Formula (1) as a main component, wherein a ratio (r/ABET) of a porosity r occupying a particle surface and a BET specific surface area ABET that is a specific surface area of the particle surface measured by a BET method is 6.0 or more and 100.0 or less:wherein ...