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. 18, 1981
Filed:
Dec. 11, 1979
Applicant:
Inventors:
Yasushi Joh, Yokohama, JP;
Akihiko Niina, Yokohama, JP;
Noriaki Kaneko, Kamakura, JP;
Toshio Sano, Yokohama, JP;
Noriyuki Ichige, Tokyo, JP;
Koji Ichikawa, Kawasaki, JP;
Akira Fukutome, Tokyo, JP;
Hisako Sonobe, Fujisawa, JP;
Assignee:
Nippon Zeon Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264 41 ; 2105002 ; 2641 / ; 264187 ; 2642091 ; 428398 ;
Abstract
A method of manufacturing a hollow fiber in which a spinning solution of cellulose ester dissolved into an organic solvent is extruded from an annular slit, and simultaneously a core liquid is introduced into the inside hollow portion of the extruded spinning solution, the core liquid being selected from the group of hydroxycarboxylic acid, derivative of hydroxycarboxylic acid, monoterpene or these mixture, or consisting of a solution of the above-described compound or mixture.