ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,318, issued on March 18, was assigned to TOPPAN Holdings Inc. (Tokyo).
"Gas-barrier laminate and packaging bag" was invented by Rika Ishii (Tokyo), Junichi Kaminaga (Tokyo), Yoshiki Koshiyama (Tokyo) and Yumiko Kojima (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a gas barrier laminate including: a paper substrate; an anchor coat layer including a first polyolefin having a polar group; a vapor-deposited layer; and an overcoat layer including a second polyolefin having a polar group, in order, in which the gas barrier laminate includes a layer including a polyvinyl alcohol-based resin between the paper substrate and the anchor co...