ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,324, issued on Jan. 28, was assigned to China Jiliang University (Hangzhou, China).

"Preparation method, product and application of composite membrane with a self-repairing function" was invented by Guoying Wei (Hangzhou, China), Benfeng Zhu (Hangzhou, China) and Zhongquan Zhang (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A preparation method, a product and an application of a composite membrane with a self-repairing function are provided by the present application, relating to the technical field of surface treatment of metallic materials. The preparation method includes the following steps: adding cobalt salt, tungsten salt, co...