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:
Mar. 08, 1994
Filed:
Jan. 27, 1993
Applicant:
Inventors:
Takashi Maeda, Kashima, JP;
Toshifumi Kawamura, Kashima, JP;
Assignee:
Petoca, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D01F / ; D01F / ; D01F / ;
U.S. Cl.
CPC ...
264183 ; 26421111 ; 26421117 ;
Abstract
A process for preparing pitch for matrix wherein an optically isotropic pitch is formed into a fibrous pitch, and the fibrous pitch thus obtained is nitrated with a nitration reagent in the presence of an acid catalyst. The resulting pitch can be carbonized with a low energy, is high in carbonization yield, low in softening point and excellent in moldability and impregnability.