ALEXANDRIA, Va., May 19 -- United States Patent no. 12,633,621, issued on May 19, was assigned to TEIJIN Ltd. (Osaka, Japan).

"Separator for non-aqueous secondary battery and non-aqueous secondary battery" was invented by Susumu Honda (Osaka, Japan) and Satoshi Nishikawa (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An embodiment of the present invention provides a separator for a non-aqueous secondary battery containing a porous substrate; a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a binder resin and inorganic particles, the inorganic particles having an average primary particle diameter from 0.01 micro metre to less ...