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. 13, 1990
Filed:
Aug. 12, 1987
Applicant:
Inventors:
Yukio Seita, Fuji, JP;
Makoto Onishi, Fuji, JP;
Assignee:
Terumo Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
21050036 ; 264 41 ;
Abstract
A porous membrane for use in the separation of blood components, made of a polyolefin, having a wall thickness in the range of 10 to 500 .mu.m, and possessing through holes having an average diameter of 0.01 to 5 .mu.m at a porosity in the range of 10 to 85%, which porous membrane is characterized by exhibiting a shrinkage of not more than 6.0% in a heat treatment carried out at 121.degree. C. for 120 minutes. A method for the manufacture of the porous membrane is also disclosed.