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. 08, 1992
Filed:
Oct. 31, 1990
Applicant:
Inventors:
Roger A Ross, Chattanooga, TN (US);
Uel D Jennings, Signal Mountain, TN (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D01F / ;
U.S. Cl.
CPC ...
264211110 ; 264 292 ; 425464 ;
Abstract
Small diameter high strength carbon fibers are produced in a process in which the spinneret has a small diameter, the spinneret capillary temperature is at least 10.degree. C. higher than the predicted spin temperature of the pitch and the pitch flows through a high aspect ratio opening upstream of the spinneret.