US Patent Issued to China National Chemical Engineering No. 13 Construction, Hainan University on Nov. 11 for "Recyclable cylindrical structure and usage method thereof" (Chinese Inventors)

ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,271, issued on Nov. 11, was assigned to China National Chemical Engineering No. 13 Construction Co. Ltd (Cangzhou, China) and Hainan University (Haikou, China).

"Recyclable cylindrical structure and usage method thereof" was invented by Qunwei Wang (Cangzhou, China) and Youliang Zhang (Haikou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Recyclable cylindrical structures and usage methods are provided. A recyclable cylindrical structure includes multiple prefabricated cylindrical units. Each unit is provided with a ring block coaxially fixed on the top of the unit, a ring slot coaxially formed in the bottom of the unit, two first sealing rin...