ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,491, issued on July 28, was assigned to SMS group GmbH (Dusseldorf, Germany).

"Method for rolling a ring-shaped rolling product having an open cylindrical cross section in a ring rolling machine, and ring rolling machine for carrying out the method" was invented by Martin Gellhaus (Bochum, Germany), Jens Riemel (Bochum, Germany), Markus Langejurgen (Wipperfurth, Germany) and Christian Vogt (Wuppertal, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for rolling a ring-shaped rolling product (5) having an open cylindrical cross section in a ring rolling machine (1) with inductive heating of the rolling product (5) during the rolling pr...