ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,459,212, issued on Nov. 4, was assigned to SEKISUI CHEMICAL Co. Ltd. (Osaka, Japan).
"Electrofusion joint and fusion method" was invented by Ayaka Kitagawa (Kyoto, Japan), Amiko Sakamoto (Kyoto, Japan), Hiroaki Kondou (Kyoto, Japan), Kouzou Makino (Kyoto, Japan) and Tsuyoshi Katou (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electrofusion joint includes a tubular main body, a stopper portion, a first heat generation section, and a second heat generation section. The tubular main body includes a joint receiving portion. The stopper portion projects inwardly on an inner surface of the tubular main body. The first heat generation section ...