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:
May. 08, 2018
Filed:
Jun. 11, 2014
Asahi Kasei E-materials Corporation, Tokyo, JP;
Asahi Kasei E-materials Corporation, Tokyo, JP;
Abstract
Disclosed is a laminated polyolefin microporous membrane having a two-type three-layer structure in which first polyolefin microporous layers are surface layers and a second polyolefin microporous layer is an intermediate layer which is different from the first polyolefin microporous layer, in which at least one of the first polyolefin microporous layers and the second polyolefin microporous layer comprises a polypropylene-based resin in which a mass ratio of polypropylene to propylene copolymer is 0 or more and 2.29 or less, and a melting point of the polypropylene copolymer is 120° C. or higher and 145° C. or lower. Also disclosed is a method of making the same.