ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,449, issued on Aug. 26, was assigned to Alleima Tube AB (Sandviken, Sweden).
"Duplex stainless steel and formed object thereof" was invented by Daniel Gullberg (Gavle, Sweden), Christina Haraldsson (Sandviken, Sweden), Anders Wilson (Gavle, Sweden), Alexander Scheerder (Sittard, Netherlands) and Kirk Ofei (Sittard, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A corrosion resistant duplex stainless steel (ferritic austenitic alloy) is suitable for use in a plant for the production of urea. Uses of the corrosion resistant duplex stainless steel include in objects made of said duplex stainless steel, in methods for the production of urea,...