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:
Jan. 20, 1987
Filed:
Mar. 20, 1985
Applicant:
Inventors:
Noriyoshi Fukuda, Chiba, JP;
Ken Nagasawa, Chiba, JP;
Assignee:
Kawasaki Steel Corporation, Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
264 291 ; 208 22 ; 208 44 ; 208 45 ; 264 297 ; 423445 ; 423448 ;
Abstract
A method of producing carbon materials having high density and strength, which method includes starting from a calcined product or its classified product having particular properties obtained by calcining a residue after heat treatment, solvent extraction and filtration of coal tar pitch at 250.degree.-500.degree. C. in an inert gas atmosphere, and then molding, firing and graphitizing it.