ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,782,044, issued on Nov. 3, was assigned to BURCKHARDT COMPRESSION AG (Winterthur, Switzerland).

"Method and apparatus for reliquefication and recycling of boil-off gas into an LNG tank" was invented by Adrian Luzi Valar (Winterthur, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for reliquefying and returning boil-off gas (BOG) to a liquefied natural gas (LNG) tank, having the steps of: compressing a BOG taken from the headspace of an LNG tank to a pressure phigh, cooling the compressed gas to a temperature T1, such as by water cooling; expanding at least part of the gas from step c) to a pressure pexpand; cooling the gas expanded in...