ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,463,221, issued on Nov. 4, was assigned to GS Yuasa International Ltd. (Kyoto, Japan).
"Lead-acid battery" was invented by Hiroki Kagohashi (Kyoto, Japan) and Yusuke Kumagai (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lead-acid battery includes a positive electrode plate, a negative electrode plate, and an electrolyte solution. The negative electrode plate includes a negative electrode material. The negative electrode material contains a polymer compound. The polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of 1H-NMR spectrum, or the negative electrode material contains a polymer compoun...