ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,410, issued on May 13, was assigned to Nalge Nunc International Corp. (Rochester, N.Y.).

"Cell culture device" was invented by Gregory S. Pankratz (Middlesex, N.Y.), Tom Nilsson (Birkerod, Denmark) and John M. Staton (Medford, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cell culturing device includes a plurality of trays that are stacked on top of each other, each of the plurality of trays having a floor and an upstanding encircling sidewall, the floor and the encircling sidewall of each tray bounding a space configured to hold a liquid cell culture medium, the plurality of trays comprising a top tray, a bottom tray and one or more interm...