ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,479, issued on Nov. 18, was assigned to Resonac Corp. (Tokyo).

"Hexagonal boron nitride powder and method for producing the same, and composition and heat dissipation material using the same" was invented by Masaru Fukasawa (Shiojiri, Japan) and Yuki Otsuka (Kawasaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hexagonal BN powder containing an aggregate of primary particles of hexagonal BN nitride and having an average primary particle diameter, a 50% volume cumulative particle diameter D50, a BET specific surface area, and a bulk density within predetermined ranges. Further, for a peak A in the particle diameter range of 1.0 micro metre...