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. 05, 2010
Filed:
Jan. 18, 2006
Applicants:
Mutsuko Endou, Atsugi, JP;
Tooru Kusano, Atsugi, JP;
Kazunari Akahira, Tokyo, JP;
Takashi Ito, Fuji, JP;
Inventors:
Mutsuko Endou, Atsugi, JP;
Tooru Kusano, Atsugi, JP;
Kazunari Akahira, Tokyo, JP;
Takashi Ito, Fuji, JP;
Assignees:
Nomura Micro Science Co., Ltd., Atsugi-shi, JP;
Asahi Kasei Chemicals Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 30/00 (2006.01); B01D 33/21 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for measuring the number of fine particles in ultrapure water includes subjecting the ultrapure water to internal pressure filtration through a hollow fiber membrane having a skin layer capable of trapping the fine particles in the ultrapure water at least on an inner surface thereof, exposing the inner surface of the hollow fiber membrane, and measuring the number of fine particles on the exposed inner surface.