ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,853, issued on Oct. 14, was assigned to TEIJIN Ltd. (Osaka, Japan).
"Prepreg and carbon fiber-reinforced composite material" was invented by Mizuki Sasaki (Osaka, Japan) and Toru Kaneko (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a prepreg including a fiber-reinforced substrate composed of a carbon fiber and an epoxy resin composition with which the fiber-reinforced substrate is partially or wholly impregnated, the prepreg being characterized in that the epoxy resin composition includes an epoxy resin, dicyandiamide, and an aromatic amine having a structure of Chemical Formula (1) in which at least one...