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:
Nov. 28, 1978
Filed:
Jan. 17, 1977
Applicant:
Inventors:
Assignee:
Daicel Ltd., Sakai, JP;
Primary Examiner:
Int. Cl.
CPC ...
B05B / ; B29D / ;
U.S. Cl.
CPC ...
264 28 ; 2105 / ; 264 49 ; 2641 / ; 264187 ; 264209 ; 428398 ;
Abstract
Asymmetric hollow fibers useful for effecting separations are prepared by spinning a solution of a fiber-forming cellulose derivative through the outer tube of a double tube-type spinneret into an aqueous coagulating bath to form a hollow fiber and simultaneously injecting an aqueous salt solution through the inner tube of the spinneret to contact the interior of the hollow fiber. The hollow fibers are dipped in warm water, then the free water is removed and the fibers are frozen and dried under vacuum.
Quick Actions:
Arisaka, Katsuharu. (1978). Process for preparing hollow fiber having selective gas permeability (U.S. Patent No. 4127625). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4127625
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile