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:
Apr. 29, 2008
Filed:
Jul. 10, 2003
Masato Takai, Ibaraki, JP;
Yoichi Matsumoto, Kurashiki, JP;
Kouji Sekiguchi, Kurashiki, JP;
Tomoki Kakiuchi, Kurashiki, JP;
Hitoshi Tsuruta, Tokyo, JP;
Takao Shimizu, Kurashiki, JP;
Masato Takai, Ibaraki, JP;
Yoichi Matsumoto, Kurashiki, JP;
Kouji Sekiguchi, Kurashiki, JP;
Tomoki Kakiuchi, Kurashiki, JP;
Hitoshi Tsuruta, Tokyo, JP;
Takao Shimizu, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Kuraray Medical Inc., Kurashiki, JP;
Abstract
A polyamide having an equilibrium water absorption of not more than 10% is used as a main material. As a polyamide having an equilibrium water absorption of not.more than 10%, for example, a polyamide comprising a dicarboxylic acid component comprising 60-100 mol % of terephthalic acid and a diamine component comprising 60-100 mol % of 1,9-nonanediamine and/or 2-methyl-1,8-octanediamine is used. As a result, a porous membrane showing extremely small dimensional change even after a hot water treatment, and particularly useful as a medical separation membrane permitting an AC sterilization treatment and the like is obtained.