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. 04, 1977
Filed:
Jan. 20, 1975
Applicant:
Inventors:
Assignee:
Japan Exlan Company Limited, , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4234471 ; 81155 ; 264 292 ;
Abstract
Carbon fibers having excellent physical properties are produced by a process which comprises heating acrylonitrile copolymer fibers made from an acrylonitrile copolymer produced by copolymerizing at least 80 mole % acrylonitrile and 0.3 to 6 mole % of an unsaturated monomer containing a carboxyl group and in which 0.1 to 15% of the terminal hydrogens of said carboxyl groups have been replaced with alkali metal cations or ammonium ions.
Matsumura, Yasuo. (1977). Process for producing carbon fibers having excellent physical properties (U.S. Patent No. 4001382). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4001382
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile