ALEXANDRIA, Va., July 3 -- United States Patent no. 12,342,830, issued on July 1, was assigned to Messer Industries USA Inc. (Wilmington, Del.).

"Onsite CO 2 generation for poultry stunning" was invented by Michael D. Newman (Hillsborough, N.J.) and Christopher T. Ebeling (Far Hills, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for stunning an animal with an exhaust gas mixture includes a stunning chamber located at a processing site to contain therein as many an animal selected to be stunned; and a combustion chamber located at the processing site for combusting a mixture to provide therefrom an exhaust gas mixture which includes carbon dioxide for stunning the animal in the stunning cha...