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:
Apr. 30, 2019
Filed:
Jun. 19, 2014
Asahi Kasei E-materials Corporation, Tokyo, JP;
Yuki Uchida, Tokyo, JP;
Hiroshi Murata, Tokyo, JP;
Hiroshi Hatayama, Tokyo, JP;
Masaki Ishikawa, Tokyo, JP;
Asahi Kasei E-materials Corporation, Tokyo, JP;
Abstract
A separator for nonaqueous electrolyte batteries having multilayer porous membrane, having a polyolefin microporous membrane and a porous layer having an inorganic filler, disposed on at least one side of the polyolefin microporous membrane, wherein, in pores with an area of 0.01 μmor more in a cross section of the porous layer, the pores having an angle θ formed between a major axis of each pore and an axis in parallel with an interface between the microporous membrane and the porous layer in a range of 60°≤θ≤120° occupying a proportion of 30% or more therein.