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:
Feb. 09, 1999
Filed:
Jan. 11, 1996
Applicant:
Inventors:
Assignee:
Korea Research Institute of Chemical Technology, Daejeon, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D01D / ; D01F / ;
U.S. Cl.
CPC ...
264 41 ; 264184 ; 2642091 ; 26421115 ; 26421117 ;
Abstract
The present invention provide a method for preparing asymmetric separation membrane having thin skin layer having reduced numbers of pin holes on the surface of the membrane for separating water/organic solvent or gas. Imide type asymmetric hollow fiber membrane according to the present invention has superior separation degree and permeability of water/organic solvent or gas over general imide type asymmetric hollow fiber membrane.