No. 04 C 5422. April 17, 2006 MEMORANDUM OPINION AND ORDER MARIA VALDEZ, Magistrate Judge This matter is before the Court on Plaintiffs' Motion to Compel [80]. For the reasons explained below, the motion is granted in part and denied in part. This is a patent infringement action involving Ropak's claims against Plastican for infringement of U.S. Patent No. 4,735,337 (the `337 patent). This patent gives Ropak an exclusive license to make certain molded plastic lids covering plastic pails. The `337