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:
Jan. 18, 2000
Filed:
Jul. 22, 1998
Applicant:
Inventors:
Hanneke Boerstoel, Arnhem, NL;
Marco Ypma, Duiven, NL;
Assignee:
Akzo Nobel nv, Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60C / ; D02G / ; D02G / ; D02G / ;
U.S. Cl.
CPC ...
152151 ; 152451 ; 428364 ; 428393 ; 428496 ;
Abstract
Cellulose extrudates can be made from an optically anisotropic solution containing 94-100 wt % of: cellulose; phosphoric acid and/or its anhydrides; and water by extruding the solution, coagulating the formed extrudates, and then aftertreating those extrudates so that they have a degree of acidity which at least equals 7. Fibers obtained by such a processs possess particularly good thermal stability and are suitable for use as a reinforcing material.