ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,550, issued on Dec. 9, was assigned to DUPONT SAFETY & CONSTRUCTION INC. (Wilmington, Del.) and DDP SPECIALTY ELECTRONIC MATERIALS US LLC (Wilmington, Del.).

"Foam envelope for sealing large volumes" was invented by Eric Huebsch (Medingen, Luxembourg), Lars Massueger (Zurich) and Cedric Thomi (Sezenove, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "An article comprising a tube having a length L, a width W and a height H, wherein the tube has peripheral areas comprising an upper section, a lower section, an inner section, and an outer section, and the tube comprises a tube wall having an inner layer and an outer layer, the inner layer bei...