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:
Oct. 19, 1999
Filed:
Apr. 23, 1998
Osamu Kato, Tokyo, JP;
Yoshio Kishimoto, Yokohama, JP;
Yutaka Arai, Tokyo, JP;
Hajime Nakajima, Yokohama, JP;
Masatoshi Furuyama, Kawasaki, JP;
Tsutomu Kihara, Yokohama, JP;
Michiharu Harakawa, Yokohama, JP;
Shigeo Hara, Yokohama, JP;
Ken Kobayashi, Himeji, JP;
Yoshiyuki Doken, Himeji, JP;
Tsutomu Nakamura, Himeji, JP;
Nippon Steel Corporation, Tokyo, JP;
Nippon Steel Chemical Co., Ltd, Tokyo, JP;
Nippon Graphite Fiber Corporation, Tokyo, JP;
Abstract
In a step of spinning a molten mesophase pitch in a process for manufacturing a pitch-type carbon fiber, the pitch is allowed to pass through an orifice and to be contracted once, is then expanded in an introduction port with a diameter greater than that of the orifice, and is then allowed to pass through an outlet pore formed at a collecting portion to spin the pitch. The pitch-type carbon fiber has a high elastic modulus in tension and high compressive strength.