ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,170, issued on May 13, was assigned to Rohm GmbH (Darmstadt, Germany).

"Simplified workup of the reactor output from an oxidative esterification" was invented by Steffen Krill (Muehltal, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process can be used for preparing methyl methacrylate by direct oxidative esterification of methacrolein. Methyl methacrylate is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA) which can be prepared by transesterification with the appr...