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:
May. 08, 1990
Filed:
Sep. 19, 1988
Applicant:
Inventors:
Ryuichi Hara, Machida, JP;
Masami Kagizaki, Kitakyushu, JP;
Tsuyoshi Takakura, Kitakyushu, JP;
Shigeki Tomono, Kawasaki, JP;
Assignee:
Mitsubishi Kasei Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D01F / ;
U.S. Cl.
CPC ...
264 292 ; 26421111 ; 425461 ;
Abstract
A carbon fiber having a cross-sectional structure of regular mesh form orientation as observed by a polarizing microscope is produced by a method comprising melt spinning pitch material through spinning nozzles, followed by infusible treatment and carbonization, wherein a mesh filter layer is provided at an upstream portion of each nozzle, and the pitch material is passed first through the mesh filter layer and then through the nozzle for spinning.