The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 1993
Filed:
Oct. 22, 1991
Eiji Kitajima, Izumi, JP;
Takashi Oyama, Izumi-Otsu, JP;
Eiji Maruden, Izumi-Otsu, JP;
Hirokazu Teraoka, Sakai, JP;
Haruki Yamasaki, Isehara, JP;
Susumu Shimizu, Chuo, JP;
Koa Oil Company Limited, Tokyo, JP;
Tanaka Kikinzoku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a carbon fiber bundle comprising a regular coil-shaped fiber bundle and having excellent stretch characteristic. A process for producing a coil-shaped carbon fiber bundle according to the present invention comprises the steps of compositing at least two kind of pitches to spin them as single fibers, bundling the thus spun single fibers to form a fiber bundle, then infusibilizing the resulting fiber bundle under tension and carbonizing the fiber bundle.