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. 15, 1979
Filed:
Mar. 07, 1978
Applicant:
Inventors:
Soichiro Kishimoto, Okayama, JP;
Isamu Obama, Okayama, JP;
Assignee:
Japan Exlan Company Limited, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4234474 ; 264 292 ; 4234475 ; 4234476 ;
Abstract
Carbon fibers having excellent physical properties and satisfactory quality uniformity are produced in an industrially advantageous manner by heat-treating acrylonitrile filaments so prepared that a specified amount of the sulfonic acid groups (--SO.sub.3 H) which have been introduced into the fiber is converted to its salt form (--SO.sub.3 X) and that the degree of filament separability of the spun fiber-bundle traveling through the heat stretching step is maintained within a specified range.
Kishimoto, Soichiro. (1979). Process for the production of carbon fibers (U.S. Patent No. 4154807). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4154807
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile