ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,907, issued on Sept. 16, was assigned to BRIDGESTONE Corp. (Tokyo).
"Rubber composition and run-flat tire" was invented by Chiyo Yamagata (Tokyo) and Shunsuke Saji (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a run-flat tire excellent in high-temperature softening inhibition, and a rubber composition from which the tire can be produced. The rubber composition contains a rubber component, a filler, a vulcanizing agent, and a vulcanization accelerator that contains a sulfenamide-based vulcanization accelerator and 1.0 to 2.0 parts by mass of tetrabenzylthiuramdisulfide based on 100 parts by mass of the rubber c...