US Patent Issued to Sumitomo Chemical on Sept. 2 for "Separator and nonaqueous electrolyte secondary battery" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,407,067, issued on Sept. 2, was assigned to Sumitomo Chemical Co. Ltd. (Tokyo).

"Separator and nonaqueous electrolyte secondary battery" was invented by Ichiro Arise (Osaka, Japan) and Saki Morizane (Niihama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A nonaqueous electrolyte secondary battery separator has a short circuit prevention effect improved by controlling the shape of a dendrite. In the nonaqueous electrolyte secondary battery separator, when unevenness data of at least one surface of the separator is analyzed, kurtosis of a data group of heights from a reference level is not less than 5, and standard deviation of the data group of th...