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. 26, 1976
Filed:
Feb. 20, 1974
Applicant:
Inventors:
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; D01F / ; D01F / ;
U.S. Cl.
CPC ...
4234471 ; 264 292 ; 264D / ;
Abstract
Carbon fibers having high tenacity and high modulus of elasticity can be obtained with a high carbonization yield and within a short period of time by heat-carbonizing acrylonitrile polymer fibers comprising a copolymer composed mainly of acrylonitrile and a compound expressed by the general formula of ##EQU1## wherein R is hydrogen or methyl group, A is an alkoxy group having 1 - 4 carbon atoms, B is a halogenated alkoxy group having 1 - 4 carbon atoms (wherein halogen is chlorine, bromine or iodine), n is 0 - 2, m is 0 - 2 and n + m is 2.