ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,007, issued on May 6, was assigned to Mitsubishi Chemical Corp. (Tokyo).

"Composition for sound insulating sheet member, sound insulating sheet member, and sound insulating structure body" was invented by Haruki Koshitouge (Tokyo) and Daichi Okuno (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A structural body including a plurality of convex-shaped rubber-elastic resonant portions, and a sheet-like support that supports the resonant portions. A specific gravity of the resonant portions is 1.0 g/cm3 or more and 3.0 g/cm3 or less, a height of the resonant portions is from 50 micro metre to 100 mm, and an areal density of the support is 1.0 kg/...