ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,209, issued on Nov. 18, was assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co. LTD. (Osaka, Japan).

"Positive electrode active material for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery" was invented by Katsuya Inoue (Hyogo, Japan), Takeshi Ogasawara (Osaka, Japan) and Yoshinori Aoki (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "This positive electrode active material for nonaqueous electrolyte secondary batteries contains: a lithium transition metal composite oxide having secondary particles, each of which is formed of aggregated primary particles; and a surface modification layer wh...