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:
Oct. 28, 2008
Filed:
Apr. 18, 2002
Sung-teh Kim, Fukuoka, JP;
Chieko Yamamoto, Fukuoka, JP;
Toshinori Koizumi, Miyazaki, JP;
Masatoshi Saitoh, Miyazaki, JP;
Shunji Maniwa, Miyazaki, JP;
Sung-Teh Kim, Fukuoka, JP;
Chieko Yamamoto, Fukuoka, JP;
Toshinori Koizumi, Miyazaki, JP;
Masatoshi Saitoh, Miyazaki, JP;
Shunji Maniwa, Miyazaki, JP;
Asahi Kasei Kuraray Medical Co., Ltd., Tokyo, JP;
Abstract
It is intended to provide asymmetric porous films which are usable in blood dialysis, plasma separation, etc. and particularly excellent in the performance of selectively separating (fractionating) plasma protein, show little endogenous coagulation, complement or quinine activily and have an extremely high biocompatibility. Porous films made mainly of a synthetic polymer and having an asymmetric structure wherein, in the sectional structure, a dense layer substantially not charged at least on the outermost surface is provided in the side on which a liquid to be treated is loaded and at least part of the film other than the outermost surface is negatively charged. In the above films, the dense layer non-charged at least on the outermost surface serves as a size barrier while the part of the film other than the outermost surface serves as a charge barrier.