ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,057, issued on March 17.
"Subsurface gas storage system" was invented by Michael D. Mercer (Edmond, Okla.) and Ronald R. Mercer (Nichols Hills, Okla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus for subsurface storage of hydrogen, compressed natural gas, and/or other high pressure gases. A storage module has a rigid outer casing which surrounds a rigid inner liner to define a sealed interior gas storage space within the inner liner and a sealed annulus space between the inner liner and the outer casing. The annulus space is filled with a fluid comprising a non-compressible liquid. A differential pressure control mechanism maintains a di...