On March 14, 2025, the USPTO’s Patent Trial and Appeal Board (PTAB) issued a Final Written Decision in an Inter Partes Review (IPR2023-01372) finding all litigation asserted claims of U.S. Patent No. 9,657,882 unpatentable. The ‘882 patent is owned by Buergofol GmbH from Germany and relates to inner film used to manufacture cured-in-place-pipe (CIPP) liners used to rehabilitate underground pipes. Buergofol had sued Omega Liner Company, Inc. for infringement of the ‘882 patent in U.S. Federal District Court over its sale of CIPP liners. Neustel Law Offices represented the IPR Petitioner, Omega Liner Company, Inc., a small CIPP liner manufacturing business with approximately 50 employees in Canton, South Dakota in the successful IPR campaign.