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:
Aug. 27, 2019
Filed:
May. 25, 2015
Applicant:
Sumitomo Electric Fine Polymer, Inc., Sennan-gun, Osaka, JP;
Inventors:
Assignee:
SUMITOMO ELECTRIC FINE POLYMER, INC., Sennan-gun, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 69/02 (2006.01); B01D 69/12 (2006.01); B01D 71/36 (2006.01); B32B 5/32 (2006.01); B01D 61/14 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); B32B 7/02 (2019.01); B32B 7/04 (2019.01); B32B 3/26 (2006.01);
U.S. Cl.
CPC ...
B01D 69/02 (2013.01); B01D 61/147 (2013.01); B01D 69/12 (2013.01); B01D 71/36 (2013.01); B32B 3/266 (2013.01); B32B 5/32 (2013.01); B32B 7/02 (2013.01); B32B 7/04 (2013.01); B32B 27/08 (2013.01); B32B 27/322 (2013.01); B01D 2325/20 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2250/04 (2013.01); B32B 2250/05 (2013.01); B32B 2250/242 (2013.01); B32B 2260/046 (2013.01); B32B 2262/101 (2013.01); B32B 2264/0207 (2013.01); B32B 2264/0214 (2013.01); B32B 2264/101 (2013.01); B32B 2264/102 (2013.01); B32B 2264/104 (2013.01); B32B 2264/105 (2013.01); B32B 2264/108 (2013.01); B32B 2307/30 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/50 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/554 (2013.01); B32B 2307/724 (2013.01); B32B 2307/726 (2013.01); B32B 2307/732 (2013.01); B32B 2457/14 (2013.01); B32B 2457/202 (2013.01);
Abstract
A porous filter includes a porous laminate in which a plurality of biaxially stretched porous sheets made of PTFE are stacked. The Gurley number G and the bubble point B (kPa) of the porous laminate satisfy the following expressions (1) and (2):log>3.7×10−0.8  (1)log<4.9×10+0.45  (2).