ALEXANDRIA, Va., July 16 -- United States Patent no. 12,359,349, issued on July 15, was assigned to TORAY INDUSTRIES Inc. (Tokyo).
"Method for manufacturing carbon fiber bundle" was invented by Takuya Kataoka (Otsu, Japan), Naoto Hosotani (Ehime, Japan), Takamitsu Hirose (Ehime, Japan) and Yusuke Kuji (Ehime, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing a carbon fiber bundle includes a stabilization process of subjecting an acrylic fiber bundle to a heat treatment within a range of 200deg C. to 300deg C. in an oxidizing atmosphere; a pre-carbonization process of performing a heat treatment within a range of 300deg C. to 1,000deg C. using a heat treatment furnace having at l...