ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,308, issued on Aug. 19, was assigned to Solventum Intellectual Properties Co. (Maplewood, Minn.).
"Multi-layered dental appliance" was invented by Richard Y. Liu (Woodbury, Minn.), Daniel J. Skamser (Ham Lake, Minn.), Bhaskar V. Velamakanni (Woodbury, Minn.), Nathaniel I. Lehn (White Bear Lake, Minn.), Mitchell A. Hirsch (Woodbury, Minn.) and Lyudmila A. Pekurovsky (Bloomington, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dental appliance for positioning a patient's teeth includes a polymeric shell with a plurality of cavities for receiving one or more teeth. The polymeric shell includes at least 3 alternating polymeric layers AB, wherein...