The European unitary patent will come into force on 1 June 2023. The novel will radically modify the European patent system with a patent that will have uniform and unitary effects throughout the European Union and will be subject to the jurisdiction of a supranational body that takes into account the high technicality of the matter: the Unified Patent Court. The European unitary patent is an alternative, but not a substitute, to the current European patent. The aim is to reduce the costs and formalities necessary to grant and maintain the European Plant Variety Rights. The patent with unitary effect, granted in accordance with the ordinary procedure before the European Patent Office (EPO), will have effect in all the participating European countries eliminating the current and expensive phase of nationalization of the title in the various Member States. The European patent with unitary effect ("unitary patent") will be issued by the European Patent Office (EPO) and will allow, through the payment of a single renewal fee directly to the EPO, to simultaneously obtain patent protection in the 25 EU countries participating in the system: Italy, France, Germany, the Netherlands, Belgium, Luxembourg, Poland, Malta, Cyprus, Greece, Sweden, Denmark, Finland, Estonia, Latvia, Lithuania, Czech Republic, Slovak Republic, Slovenia, Portugal, Austria, Romania, Bulgaria, Hungary, Ireland. Although the 25 EU Member States participate in the unitary patent regime, initially the unitary patents granted by EPO will not cover the territory of all 25 countries, because some of them have not yet ratified the TUB Agreement. As a result, there will initially be unitary patents with different territorial coverage. Italy has for some time completed the legal requirements for joining the TUB and the unitary patent system and has designated Milan to host the local headquarters of the TUB in Italy. Merit of the new system is that to guarantee a remarkable saving in phase of concession and maintenance of the title, answering therefore to the requirements of internationalization of the enterprises. The patent with unitary effect is a single title; judgments on its validity and on the infringement by competitors is therefore left to the newly established Unified Court. The Unified Patent Court will have exclusive jurisdiction to know about the validity and infringement of unitary patents and the relative decisions will have direct effect in all the acceding States. The procedure is rapid and guarantees three degrees of judgment, like our domestic legal system, providing for the appellation of decisions before the Court of Appeal in Luxembourg and, finally, the Court of Justice. From 1 March 2023 began in fact the c.d. sunrise period during which the owners can decide whether to request to delay the granting of applications already filed to re-enter the system or exercise the c.d. opt-out.