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. 22, 1994
Filed:
Dec. 03, 1992
Applicant:
Inventors:
Chieh-Chun Chau, Midland, MI (US);
Timothy L Faley, Midland, MI (US);
Michael E Mills, Midland, MI (US);
Masaru Nakagawa, Ohtsu City, JP;
Timothy J Rehg, Midland, MI (US);
Myrna Serrano, Midland, MI (US);
Ravi Shanker, Missouri City, TX (US);
George J Quarderer, Jr, Midland, MI (US);
Yoshihiko Teramoto, Ohtsu City, JP;
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D01D / ; D01D / ; D01F / ;
U.S. Cl.
CPC ...
264205 ; 2642108 ; 26421112 ; 264232 ; 264233 ; 264234 ;
Abstract
Polybenzazole polymer dopes are spun into fibers at high speed by passing through a spinneret with proper selection of hole geometry, followed by spin-drawing to a spin-draw ratio of at least 20, washing, taking up and drying. The take up speed is at least about 150 meters per minute, and the fibers are spun in at least 10 km lengths without a break.