ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,932, issued on Aug. 26, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).

"Propellant management method and satellite constellation forming system" was invented by Hisayuki Mukae (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An object is to prevent satellites constituting a mega-constellation from remaining in outer space in large numbers after completing their missions. An artificial satellite includes a propulsion device. The artificial satellite has propellant to be used by the propulsion device, and the propellant is in an amount required for the artificial satellite to operate in orbit for a first period of L1 years, which is a satelli...