Evansville, Indiana – Patent attorneys for Berry Plastics Corporation of Evansville, IN, initiated a lawsuit seeking a declaratory ruling that a patent held by Intertape Polymer Corporation of Bradenton, FL, is invalid and unenforceable due to inequitable conduct before the U.S. Patent Office. Namely, the complaint asserts that Patent No. 7,476,416, titled PROCESS FOR PREPARING ADHESIVE USING PLANETARY EXTRUDER, is invalid as, prior to their patent application date, two of the co-inventors saw a similar product displayed at a trade show and had it explained to them in detail, but never disclosed this prior public presentation to the Patent Office.