ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,572, issued on April 15, was assigned to AMCOR FLEXIBLES NORTH AMERICA INC. (Neenah, Wis.).

"Ovenable tray composite and package" was invented by Hanna-Mari Lahti (Lempaala, Finland), Kalle Ilmari Nattinen (Tempere, Finland) and Andrew J. Lischefski (Appleton, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ovenable tray composite that includes a polymeric based liner and a fiber based component. The liner has an exterior surface layer and an interior surface layer comprising a polypropylene. The polypropylene has a Melt Index of about 0.2 grams/10 minutes to about 2 grams/10 minutes. The interior surface layer of the polymeric based liner is ...