ALEXANDRIA, Va., June 16 -- United States Patent no. 12,656,016, issued on June 16, was assigned to Captive-Aire Systems Inc. (Raleigh, N.C.).
"Commercial kitchen installation with double wall grease duct" was invented by William Brian Griffin (Columbia, Pa.), Nicholas I. Perry (Warrington, Pa.) and Kyle D. Thompson (Lancaster, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A grease duct assembly is employed in a commercial kitchen. The grease duct assembly includes multiple sections that are connected together and sealed. Each section includes a double wall construction that forms a central conduit and an annular space that extends between an inner wall and an outer wall. Shredded insulation is directed...