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:
Feb. 12, 2013
Filed:
Dec. 06, 2011
Koichiro Yonetake, Yamagata, JP;
Tatsuhiro Takahashi, Yamagata, JP;
Ryuji Yamamoto, Kanagawa, JP;
Toshio Morita, Kanagawa, JP;
Koichiro Yonetake, Yamagata, JP;
Tatsuhiro Takahashi, Yamagata, JP;
Ryuji Yamamoto, Kanagawa, JP;
Toshio Morita, Kanagawa, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A fine carbon fiber having linearity, each fiber filament of the carbon fiber having a bending angle of 30° or less with respect to the longitudinal direction of the fiber filament, and including a hollow space extending along its axis, and having an outer diameter of 1 to 1,000 nm, an aspect ratio of 5 to 1,000, and a BET specific surface area of 2 to 2,000 m/g, wherein the average interlayer distance (d) of the carbon fiber at a (002) plane is 0.345 nm or less as measured by means of X-ray diffractometry, and the ratio of the peak height (Id) of the band at 1,341 to 1,349 cmin a Raman scattering spectrum of the carbon fiber to that of the peak height (Ig) of the band at 1,570 to 1,578 cmin the spectrum (Id/Ig) is 0.1 to 2. The fiber exhibits excellent dispersibility in a matrix.