ALEXANDRIA, Va., June 16 -- United States Patent no. 12,658,530, issued on June 16, was assigned to TEIJIN Ltd. (Osaka, Japan).
"Separator for non-aqueous secondary battery and non-aqueous secondary battery" was invented by Hiroshi Sakurai (Osaka, Japan), Tokimitsu Kobayashi (Osaka, Japan) and Satoshi Nishikawa (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and a porous layer that is provided on one side of the porous substrate, and that contains a resin and a filler, in which a shrinkage ratio in a MD direction, when heat-treated at 100deg C. for 30 minutes under no tension, is more than 1.2% and less th...