US Patent Issued to CHINA ACADEMY OF RAILWAY SCIENCES, RAILWAY ENGINEERING RESEARCH INSTITUTE, CHINA ACADEMY OF RAILWAY SCIENCES on Jan. 27 for "Spray-applied polyurethane insulation material for tunnels in cold regions, its application, and its construction method" (Chinese Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,629, issued on Jan. 27, was assigned to CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED (Beijing) and RAILWAY ENGINEERING RESEARCH INSTITUTE, CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED (Beijing).

"Spray-applied polyurethane insulation material for tunnels in cold regions, its application, and its construction method" was invented by Xiaoxiong Guo (Beijing), Weibin Ma (Beijing), Quanxiao Dong (Hebei, China), Zefu Zheng (Beijing), Peng Qiu (Hebei, China), Tianyuan Xu (Beijing), Chi Luo (Beijing), Cheng Qiu (Hebei, China), Peng Zhao (Beijing), Yao Li (Beijing), Zheli An (Beijing), Xingxu Bao (Hebei, China), Simeng Yan (Hebei, China), Xueliang Cui (Hebei, China), Xueh...