ALEXANDRIA, Va., June 2 -- United States Patent no. 12,642,625, issued on June 2, was assigned to Solventum Intellectual Properties Co. (Maplewood, Minn.).
"Methods of controlling haze in orthodontic appliances including semi-crystalline polymers" was invented by Ta-Hua Yu (Woodbury, Minn.), Pamela A. Percha (Woodbury, Minn.), Karl J.L. Geisler (St. Paul, Minn.) and Bruce R. Broyles (Oakdale, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dental appliance includes a polymeric shell with a plurality of cavities for receiving one or more teeth, including an interior region with a core layer of a first thermoplastic polymer A with a thermal transition temperature of about 70deg C. to about 140deg C. and...