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:
Nov. 20, 2018
Filed:
Mar. 13, 2017
Applicants:
Jnc Corporation, Tokyo, JP;
Jnc Filter Co., Ltd., Osaka-shi, Osaka, JP;
Inventors:
Assignees:
JNC Corporation, Tokyo, JP;
JNC Filter Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 39/00 (2006.01); B01D 63/06 (2006.01); B01D 71/26 (2006.01); B01D 71/36 (2006.01); B32B 27/00 (2006.01);
U.S. Cl.
CPC ...
B01D 63/067 (2013.01); B01D 71/26 (2013.01); B01D 71/36 (2013.01); B01D 2313/44 (2013.01);
Abstract
There is provided a pleated cartridge filter for high-purity chemicals that minimizes elution of metal from polyethylene into high-purity chemicals and is suitable mainly for a resist manufacturing process. A cylindrical pleated cartridge filter including a cylindrical core, a pleated filter material wound on the core, and caps sealing both ends of the core, wherein the pleated filter material is composed of a filtration membrane and a spacer laminated together, and the spacer is a nonwoven fabric made of polyethylene fibers having a metal element content of less than 40 ppm.