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:
Aug. 06, 1991
Filed:
Aug. 19, 1988
Applicant:
Inventors:
Eiji Fujisawa, Fukushima, JP;
Tadanori Kitamura, Fukushima, JP;
Assignees:
Nitto Boseki Co., Ltd., Fukushima, JP;
Kawasaki Steel Corporation, Kobe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10C / ; C08L / ; D01F / ; D01F / ; D01F / ;
U.S. Cl.
CPC ...
428373 ; 208 23 ; 208 39 ; 264 292 ; 264211 ; 26421111 ; 4234472 ; 4234474 ; 4234476 ;
Abstract
The present invention relates to a carbon fiber having a novel structure in which the outer circumferential part of fiber section is constituted of an optically isotropic component and its central part is constituted of an optically anisotropic component or an optically anisotropic component partially containing optically isotropic component, which the carbon fiber shows no cracks at all, as well as to a process for producing said carbon fiber.
Fujisawa, Eiji. (1991). Carbon fiber and process for producing the same (U.S. Patent No. 5037697). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5037697
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile