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. 14, 1989
Filed:
Aug. 06, 1987
Applicant:
Inventors:
Erich H Harttig, Hechingen, DE;
Reinhold J Buck, Alleshausen, DE;
Hermann J Gohl, Bisingen-Zimmern, DE;
Assignee:
Gambro Dialysatoren KG, , SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01D / ; D01F / ;
U.S. Cl.
CPC ...
264 41 ; 264 83 ; 264561 ; 264562 ; 264182 ; 264184 ; 264185 ; 264205 ; 264206 ; 2642091 ; 26421115 ; 26421116 ; 264234 ; 264345 ; 264186 ; 21050023 ; 21050027 ;
Abstract
Processes for producing semipermeable membranes in the form of hollow fibers are disclosed including extruding a solution of a block copolymer including at least one hydrophilic polymer and at least one hydrophobic polymer while simultaneously injecting a gaseous or vaporous center medium into the center bore of the hollow fiber extrudate, including coagulating the extrudate so formed therefrom. The preferred process includes using air or the components of air as the center medium and employing a polyethyleneoxide-polycarbonate block copolymer to form the hollow fiber membranes.