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:
Apr. 27, 2010
Filed:
Apr. 22, 2004
Tomoyoshi Higashi, Kawasaki, JP;
Eiji Kambara, Kawasaki, JP;
Katsuyuki Tsuji, Kawasaki, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A method for producing vapor-grown carbon fibers, comprising contacting a carbon compound with a catalyst and/or a catalyst precursor compound in a heating zone, wherein the carbon compound is a combination of compounds respectively selected from carbon compounds having no benzene ring structure within molecule [Group (a)] and from aromatic compounds [Group (b)], these compounds satisfy the conditions that, in the raw materials, (number of atoms of element as catalyst)/(number of all carbon atoms) & equals; 0.000005 to 0.0015 and [number of carbon atoms contained in compound of Group (a)]/[number of carbon atoms contained in compound of Group (a)+number of carbon atoms contained in compound of Group (b)] & equals; 0.001 to 0.9, and the residence time in the temperature region of 600° C. or more is 30 seconds or less.