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. 24, 1998
Filed:
Jun. 20, 1995
Iwao Yamamoto, Kagawa, JP;
Akira Nakagoshi, Tokyo, JP;
Akihiko Yoshiya, Kagawa, JP;
Kazuo Shirosaki, Kitakyushu, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A pitch based carbon fiber, having a thermal conductivity in the direction of the fiber axis of from 500 to 1,500 W/m.multidot.K, a tensile modulus of at least 85 ton/mm.sup.2, a compression strength of at least 35 kg/mm.sup.2, a laminated layer thickness, Lc, of graphite crystallites of from 30 to 50 nm, and a ratio thereto of a spread, La, of graphite crystallites in the direction of the layer plane, of at least 1.5, has high thermal conductivity, excellent compression strength and an excellent tensile modulus of elasticity. When a cross section of said fiber in the direction of the fiber axis is observed by a polarization microscope with 1,000 X magnifications, the domain size as observed is at most 500 nm.