ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,917, issued on Sept. 16, was assigned to DENKA COMPANY Ltd. (Tokyo).
"Fiber for artificial hair and hair accessory product" was invented by Atsushi Horihata (Kamakura, Japan), Masamichi Kanaoka (Kamakura, Japan), Masashi Kume (Tokyo) and Atsushi Takei (Kamakura, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fiber for artificial hair, the fiber containing 50 parts by mass or more and 95 parts by mass or less of a vinyl chloride-based resin and 5 parts by mass or more and 50 parts by mass or less of a vinyl-based copolymer resin, in which the vinyl-based copolymer resin contains 60% by mass or more and less than 70% by mass of a styrene-base...