ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,503,639, issued on Dec. 23, was assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS (Dhahran, Saudi Arabia).

"Method of storing hydrogen gas in a subsurface formation" was invented by Md Bashirul Haq (Dhahran, Saudi Arabia), Dhafer Abdullah Al Shehri (Dhahran, Saudi Arabia) and Nasiru Salahu Muhammed (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of storing hydrogen (H2) gas in a subsurface formation having an injection well, a production well and a heat well. The method includes injecting a H2-containing fluid stream into the subsurface formation via the injection well to form a storage composition containing a ga...