ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,221, issued on Jan. 27, was assigned to MAREL MEAT A/S (Roskilde, Denmark).
"Method of reducing stress level in animals" was invented by Leif Lykke (Vaerlose, Denmark) and Steen Hegnsgaard Weihe (Morkov, Denmark).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of reducing stress level in animals such as pigs may include: sealable enclosing the animals in at least one chamber; exposing the animals to a gas mixture comprising oxygen and at least one type of physiologically inert gas; gradually decreasing the oxygen concentration from a maximum level, to a minimum level; gradually increasing the at least one physiologically inert gas concentrati...