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:
Jun. 04, 1985
Filed:
Apr. 09, 1982
Seiichi Uemura, Tokyo, JP;
Shunichi Yamamoto, Kamakura, JP;
Takao Hirose, Kamakura, JP;
Hiroaki Takashima, Kawasaki, JP;
Osamu Kato, Yokohama, JP;
Nippon Oil Co., Ltd., Tokyo, JP;
Abstract
A starting pitch for carbon fibers, obtained by (A) mixing together (1) a heavy fraction oil boiling at not lower than 200.degree. C. obtained at the time of fluidized catalytic cracking of petroleum, (2) a hydrogenated oil selected from aromatic hydrocarbons of 2-10 rings having their nuclei partly hydrogenated and specific fractions boiling at 160.degree.-650.degree. C. and containing such aromatic hydrocarbons and (3) a heavy fraction oil boiling at not lower than 200.degree. C. obtained at the time of steam cracking of petroleum, to form a mixture of the oils (1), (2) and (3), and then (B) heat treating the thus formed oil mixture at 370.degree.-480.degree. C. and 2-50 Kg/cm.sup.2.G thereby to obtain the starting pitch.