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:
Aug. 24, 1993
Filed:
Jun. 20, 1989
Applicant:
Inventors:
Michael B Sumner, Ceredo, WV (US);
William P Hettinger, Russell, KY (US);
Assignee:
Ashland Oil, Inc., Ashland, KY (US);
Primary Examiner:
Int. Cl.
CPC ...
D01F / ; C10C / ;
U.S. Cl.
CPC ...
4234474 ; 4234477 ; 208 39 ; 208 44 ; 264292 ; 264 83 ;
Abstract
Producing carbon fiber precursors and carbonized fibers comprise by treating a thin film of catalytic pitch at elevated temperature conditions, treating the resulting heavy isotropic pitch by agitating with an inert gas under elevated temperature conditions to form a mesophase pitch, forming green fibers from said mesophase pitch, stabilizing and optionally carbonizing said green fibers to obtain the desired product.