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. 28, 2018
Filed:
Aug. 28, 2015
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Takahiro Okugawa, Niihama, JP;
Yutaka Suzuki, Tsukuba, JP;
Tomoaki Ozeki, Niilhama, JP;
Chikara Murakami, Osaka, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/14 (2006.01); H01M 2/16 (2006.01); B32B 27/32 (2006.01); B29C 37/00 (2006.01); C08J 5/18 (2006.01);
U.S. Cl.
CPC ...
B32B 27/32 (2013.01); B29C 37/0025 (2013.01); C08J 5/18 (2013.01); H01M 2/14 (2013.01); H01M 2/16 (2013.01); B32B 2250/242 (2013.01); B32B 2307/306 (2013.01); B32B 2307/538 (2013.01);
Abstract
A roll is made of a porous film in a belt-like shape, the porous film having a width of not smaller than 20 mm. In a case where a roughness along a width direction of an outermost surface of the roll is measured at 1 mm intervals across an entire width of the outermost surface, a difference between a maximum roughness value and a minimum roughness value in a distance of 20 mm in the width direction of the outermost surface is less than 25 μm.