ALEXANDRIA, Va., April 7 -- United States Patent no. 12,597,604, issued on April 7, was assigned to PANASONIC HOLDINGS Corp. (Osaka, Japan).
"Nonaqueous electrolyte secondary battery" was invented by Keiichi Takahashi (Hyogo, Japan), Fumiharu Niina (Hyogo, Japan) and Shinya Suzuki (Hyogo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A nonaqueous electrolyte secondary battery according to the present invention comprises a positive electrode that contains, as positive electrode active materials: a lithium transition metal composite oxide (A) that is configured of secondary particles, in each of which primary particles having an average particle diameter of 0.5 micro metre or more aggregate, or is confi...