ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,571, issued on April 22, was assigned to CHANG CHUN PETROCHEMICAL Co. LTD. (Taipei, Taiwan).

"Polymer film and uses of the same" was invented by Tzu-Jung Huang (Taipei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polymer film is provided. The polymer film sequentially includes a first layer, a second layer and a third layer, where the two surfaces of the second layer are in contact with the first layer and the third layer, respectively. The first layer has a first melt index, the second layer has a second melt index, and the third layer has a third melt index. The second melt index ranges from 3.5 g/10 min to 10.0 g/10 min, the first melt...