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:
Dec. 23, 1986
Filed:
Mar. 28, 1985
Applicant:
Inventors:
Mitsuaki Matsumoto, Kawasaki, JP;
Masatosi Furuyama, Kawasaki, JP;
Tadao Tomioka, Kawasaki, JP;
Hirofumi Sunago, Kawasaki, JP;
Masakazu Higuchi, Kawasaki, JP;
Assignees:
Nippon Steel Corporation, Tokyo, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C09C / ; C10C / ; C10C / ;
U.S. Cl.
CPC ...
423449 ; 423445 ; 423448 ; 208 22 ; 208 39 ; 208 44 ;
Abstract
A mesophase pitch suitable for carbon products, particularly for carbon fibers, which has a mesophase content of at least 40%, preferably at least 60%, and a larger mesophase domain, is produced by adding at least one part by weight of at least one of an alcohol and a phenol to 100 parts by weight of heavy bitumens, subjecting the resulting mixture to pretreatment by heating at least at 250.degree. C., and then subjecting the pretreated mixture to heat treatment until mesophases are formed.