ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,642, issued on April 21, was assigned to TOYO TIRE Corp. (Itami, Japan).

"Terminally modified diene-based polymer and method for producing the same" was invented by Taiki Iwachi (Itami, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a terminally modified diene-based polymer having excellent mechanical properties, and also a method for producing the same. The terminally modified diene-based polymer is obtainable by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with a heterocyclic compound that is a nitrogen-containing unsaturated five-membered ring or six-membered ring compound having a primary ...