ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,276, issued on June 24, was assigned to Evonik Operations GmbH (Essen, Germany).
"Device and a membrane process for separating gas components from a gas stream having varying composition or flow rate" was invented by Steven Kristian Pedersen (Nottawa, Canada), Hendrik Derk Hoving (Mountain lakes, N.J.), Markus Priske (Salzburg, Austria), Kah Peng Lee (Seewalchen, Austria) and Norbert Krutzler (Puhret, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device for separating a gas stream which has a compressor and three membrane separation units in series, connected to pass the retentate stream of each of the first two units to the subsequent me...