AbstractSince its launching, the Unified Patent Court (UPC) project has faced obstacles and scepticism from some EU Member States. When the United Kingdom ratified the UPC Agreement in 2018, it seemed that there was nothing left but to wait for a positive decision of the Federal Constitutional Court of Germany on the ratification by that country, so that finally the UPC could start its activity. Nevertheless, 2020 brought events that make one look back and reflect on the project itself. The UK withdrew its ratification and the Federal Constitutional Court ruled the German ratification process of the UPC Agreement unconstitutional. Then two new complaints were submitted to the Federal Constitutional Court, which this summer finally gave the green light to the ratification, but it seems the UPC project has already split Europe. The question that arises is whether, in the context of last year’s events and the fracture between the states, the unitary patent system can still be seen as unifying the European patent litigation system. This article discusses the examples of Poland, Hungary and the UK, as countries that refuse to participate in the system due to its interference in their internal legal systems and sovereignty, and other examples of fractures visible in the UPC.