ALEXANDRIA, Va., July 7 -- United States Patent no. 12,672,939, issued on July 7, was assigned to Solventum Intellectual Properties Co. (Eagan, Minn.).

"Dental appliances from multilayer films having discrete structures covered by an ion permeable release layer" was invented by Yizhong Wang (Woodbury, Minn.) and Ta-Hua Yu (Woodbury, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for making a dental appliance configured to position at least one tooth of a patient includes printing a hard-enable liquid resin composition on a major surface of a polymeric material to form a pattern of discrete unhardened liquid regions thereon; at least partially hardening the unhardened liquid regions to form a c...