ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,679, issued on May 19, was assigned to TORAY INDUSTRIES Inc. (Tokyo).
"Prepreg" was invented by Takashi Ochi (Iyo-gun, Japan), Ryohei Watari (Iyo-gun, Japan) and Atsuhito Arai (Iyo-gun, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention addresses the problem of providing a prepreg that yields a carbon fiber composite material that has exceptional tensile strength, heat resistance, and impact resistance and is suitable as a structural material of an aircraft body, wherein the resin composition used in the prepreg furthermore has exceptional viscosity stability, the prepreg containing a resin composition that contains carbon fib...