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:
Sep. 12, 1978
Filed:
Sep. 01, 1976
Applicant:
Inventors:
Assignee:
Japan Exlan Company Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4234474 ; 264 292 ; 264182 ; 4234476 ;
Abstract
Carbon fibers are prepared by spinning a copolymer of a carboxyl group-containing unsaturated monomer and at least 85 mol% acrylonitrile, washing the filaments with water, stretching the filaments in hot acid water having a pH below 3.5, and heating the resultant fibers to cause carbonization or graphitization.
Fukushima, Keitaro. (1978). Process for producing carbon fibers (U.S. Patent No. 4113847). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4113847
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile