ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,791, issued on Dec. 30, was assigned to CIVIL AVIATION UNIVERSITY OF CHINA (Tianjin, China).

"Fire extinguishing air bubble film filled with gaseous fire-extinguishing medium, and manufacturing method therefor" was invented by Haijun Zhang (Tianjin, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a fire extinguishing air bubble film filled with a gaseous fire-extinguishing medium, and a manufacturing method therefor. The fire extinguishing air bubble film includes a double-layer air bubble film base material and buffer air bubbles distributed in the double-layer air bubble film base material and internally filled...