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. 07, 1987
Filed:
Jan. 17, 1986
Applicant:
Inventors:
Seiichi Uemura, Tokyo, JP;
Takao Hirose, Kamakura, JP;
Yoshio Sohda, Kawasaki, JP;
Takayoshi Sakamoto, Hiratsuka, JP;
Kenji Katoh, Kawasaki, JP;
Assignee:
Nippon Oil Company, Limited, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01C / ; D01F / ;
U.S. Cl.
CPC ...
4234472 ; 4234474 ; 4234476 ; 264 292 ;
Abstract
In the process for producing pitch carbon fibers by melt-spinning a carbonaceous pitch, and infusiblizing the resulting pitch fibers followed by carbonization and, additionally as needed, graphitization, the pitch fibers are subjected to infusiblization treatment following application of a dimethyl polysiloxane having a viscosity at 25.degree. C. in the range between 0.5 and 500 cSt and removing said dimethyl polysiloxane by washing prior to the carbonization.