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:
Nov. 24, 1998
Filed:
Aug. 14, 1996
Applicant:
Inventors:
Iwao Yamamoto, Kagawa, JP;
Akihiko Yoshiya, Kagawa, JP;
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01F / ;
U.S. Cl.
CPC ...
4234472 ; 4234476 ;
Abstract
Pitch based carbon fibers characterized in that their thermal conductivity is at least 1,000 W/m.multidot.K as measured at room temperature, their electrical resistivity is at most 1.2 .mu..OMEGA.m, their tensile modulus is at least 95 ton/mm.sup.2, their compression strength is at least 30 kg/mm.sup.2, and the ratio of crack-free fibers to cracked fibers is from 5/95 to 30/70, where the crack-free fibers are fibers having no cracks in their cross section, and the cracked fibers are fibers having cracks in their cross section.