Stijn Lagaert possesses extensive expertise spanning the biotechnology, pharmaceutical chemistry, plant protection products, fertilizers, and food and feed technologies sectors. He is well-versed in the entire spectrum of patent-related activities, including the meticulous drafting and prosecution of European and International patent applications, delivering strategic counsel on filing strategies, and conducting thorough patentability assessments and freedom-to-operate studies.


Thanks to his experience in due diligence work, Stijn excels in scrutinizing and appraising third-party patent portfolios, as well as optimizing clients’ patent portfolios for airtight due diligence evaluations. He is a seasoned advocate in defensive and offensive opposition and appeal proceedings before the European Patent Office, advocating for his clients’ rights with precision.


Moreover, Stijn Lagaert is a recognized authority on Supplementary Protection Certificates for both pharmaceuticals and agricultural products. He is qualified to represent clients before the Unitary Patent Office and is a registered Court Expert for patent matters before the Belgian courts. He has experience in requesting as well as performing (descriptive) seizure procedures related to presumed patent infringement.


  • Supplementary Protection Certificates
  • Breeder’s Rights
  • Patents


  • Court Expert
  • European Patent Litigator
  • European and Belgian Patent Attorney
  • European Trademark & Design Attorney
  • Diploma in Patent Litigation in Europe


  • PhD in Bioscience Engineering, University of Leuven (Belgium), 2010
  • Master in Bioscience Engineering – Cell & Gene Biotechnology, University of Leuven (Belgium), 2006


  • Lagaert, S. (2012). Extending your patent on a new application of an old drug. International Pharmaceutical Industry, 4: 24-28