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:
Dec. 03, 2013
Filed:
Mar. 14, 2011
Satoshi Nakashima, Ibaraki, JP;
Yasushi Usami, Shiga, JP;
Kazutaka Sakaki, Shiga, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Mitsubishi Plastics, Inc., Tokyo, JP;
Abstract
An object of this invention is to improve battery performance such as a rate capability of a nonaqueous electrolyte solution secondary battery using a separator constituting a thermoplastic resin-based porous film containing a filler. This invention provides a nonaqueous electrolyte solution secondary battery separator which is formed from a porous film containing a thermoplastic resin and a filler contained in the thermoplastic resin and has a content of chlorine of 10 ppm or less or a content of iron of 100 ppm or less as well as relates to a nonaqueous electrolyte solution secondary battery using this separator.