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:
Jan. 20, 1976
Filed:
Apr. 11, 1974
Applicant:
Inventors:
Assignee:
Japan Exlan Company Limited, , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423447 ; 264 29 ;
Abstract
A process for producing carbon fibers which comprises (a) treating preoxidized fibers produced from an acrylonitrile fiber with a reducing liquid containing a specific compound and (b) thereafter carbonizing or graphitizing the treated fibers at a temperature above 800.degree. C. The thus-obtained carbon or graphite fibers have a high tensile strength and a high modulus of elasticity.