ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,082, issued on March 25, was assigned to NIPPON SHOKUBAI Co. LTD. (Osaka, Japan).

"Easily polymerizable substance handling device" was invented by Shingo Nakaoka (Himeji, Japan) and Koji Nomoto (Himeji, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An easily polymerizable substance handling device is provided that can prevent generation of irregularities and steps between a pipeline and a cover member due to the cover member being installed at an opening part of the pipeline. A cover part 3 is formed to have a curved surface 3a on a side closer to inside of a pipeline 1. The shape of the surface 3a on the pipeline 1 side is preferably a conc...