"The envisaged agreement creating a unified patent litigation system (currently called ‘European and Community Patents Court’) is not compatible with the provisions of the EU Treaty and the FEU Treaty".Highlights of the Court's ruling, which affirms the Opinion of the Advocates General delivered by AG Kokott (noted here), include the following (shorn of most of the citiations):
"71. As regards the characteristics of the PC, it must first be observed that that court is outside the institutional and judicial framework of the European Union. It is not part of the judicial system provided for in Article 19(1) TEU. The PC is an organisation with a distinct legal personality under international law.
72. In accordance with Article 15 of the draft agreement, the PC is to be vested with exclusive jurisdiction in respect of a significant number of actions brought by individuals in the field of patents. That jurisdiction extends, in particular, to actions for actual or threatened infringements of patents, counterclaims concerning licences, actions for declarations of non‑infringement, actions for provisional and protective measures, actions or counterclaims for revocation of patents, actions for damages or compensation derived from the provisional protection conferred by a published patent application, actions relating to the use of the invention before the granting of the patent or to the right based on prior use of the patent, actions for the grant or revocation of compulsory licences in respect of Community patents, and actions for compensation for licences. To that extent, the courts of the contracting States, including the courts of the Member States, are divested of that jurisdiction and accordingly retain only those powers which are not subject to the exclusive jurisdiction of the PC.
73. ... in accordance with Article 14a of the draft agreement, the PC, in carrying out its tasks, has the duty to interpret and apply European Union law. The draft agreement confers on that court the main part of the jurisdiction ratione materiae held, normally, by the national courts, to hear disputes in the Community patent field and to ensure, in that field, the full application of European Union law and the judicial protection of individual rights under that law.
74. As regards an international agreement providing for the creation of a court responsible for the interpretation of its provisions, the Court has, it is true, held that such an agreement is not, in principle, incompatible with European Union law. The competence of the European Union in the field of international relations and its capacity to conclude international agreements necessarily entail the power to submit itself to the decisions of a court which is created or designated by such agreements as regards the interpretation and application of their provisions ...
75. Moreover, the Court has stated that an international agreement concluded with third countries may confer new judicial powers on the Court provided that in so doing it does not change the essential character of the function of the Court as conceived in the EU and FEU Treaties ...
76. The Court has also declared that an international agreement may affect its own powers provided that the indispensable conditions for safeguarding the essential character of those powers are satisfied and, consequently, there is no adverse effect on the autonomy of the European Union legal order ...
77. However, the judicial systems under consideration in the abovementioned Opinions were designed, in essence, to resolve disputes on the interpretation or application of the actual provisions of the international agreements concerned. Further, while providing particular powers to the courts of third countries to refer cases to the Court for a preliminary ruling, those systems did not affect the powers of the courts and tribunals of Member States in relation to the interpretation and application of European Union law, nor the power, or indeed the obligation, of those courts and tribunals to request a preliminary ruling from the Court of Justice and the power of the Court to reply.
78. By contrast, the international court envisaged in this draft agreement is to be called upon to interpret and apply not only the provisions of that agreement but also the future regulation on the Community patent and other instruments of European Union law, in particular regulations and directives in conjunction with which that regulation would, when necessary, have to be read, namely provisions relating to other bodies of rules on intellectual property, and rules of the FEU Treaty concerning the internal market and competition law. Likewise, the PC may be called upon to determine a dispute pending before it in the light of the fundamental rights and general principles of European Union law, or even to examine the validity of an act of the European Union.
79. As regards the draft agreement submitted for the Court’s consideration, it must be observed that the PC:
– takes the place of national courts and tribunals, in the field of its exclusive jurisdiction described in Article 15 of that draft agreement,
– deprives, therefore, those courts and tribunals of the power to request preliminary rulings from the Court in that field,
– becomes, in the field of its exclusive jurisdiction, the sole court able to communicate with the Court by means of a reference for a preliminary ruling concerning the interpretation and application of European Union law and
– has the duty, within that jurisdiction, in accordance with Article 14a of that draft agreement, to interpret and apply European Union law.
80. While it is true that the Court has no jurisdiction to rule on direct actions between individuals in the field of patents, since that jurisdiction is held by the courts of the Member States, nonetheless the Member States cannot confer the jurisdiction to resolve such disputes on a court created by an international agreement which would deprive those courts of their task, as ‘ordinary’ courts within the European Union legal order, to implement European Union law and, thereby, of the power provided for in Article 267 TFEU, or, as the case may be, the obligation, to refer questions for a preliminary ruling in the field concerned.
81. The draft agreement provides for a preliminary ruling mechanism which reserves, within the scope of that agreement, the power to refer questions for a preliminary ruling to the PC while removing that power from the national courts.
82. It must be emphasised that the situation of the PC envisaged by the draft agreement would differ from that of the Benelux Court of Justice which was the subject of Case C‑337/95 Parfums Christian Dior  ECR I‑6013, paragraphs 21 to 23. Since the Benelux Court is a court common to a number of Member States, situated, consequently, within the judicial system of the European Union, its decisions are subject to mechanisms capable of ensuring the full effectiveness of the rules of the European Union.
83. It should also be recalled that Article 267 TFEU, which is essential for the preservation of the Community character of the law established by the Treaties, aims to ensure that, in all circumstances, that law has the same effect in all Member States. The preliminary ruling mechanism thus established aims to avoid divergences in the interpretation of European Union law which the national courts have to apply and tends to ensure this application by making available to national judges a means of eliminating difficulties which may be occasioned by the requirement of giving European Union law its full effect within the framework of the judicial systems of the Member States. Further, the national courts have the most extensive power, or even the obligation, to make a reference to the Court if they consider that a case pending before them raises issues involving an interpretation or assessment of the validity of the provisions of European Union law and requiring a decision by them...
84. The system set up by Article 267 TFEU therefore establishes between the Court of Justice and the national courts direct cooperation as part of which the latter are closely involved in the correct application and uniform interpretation of European Union law and also in the protection of individual rights conferred by that legal order.
85. It follows from all of the foregoing that the tasks attributed to the national courts and to the Court of Justice respectively are indispensable to the preservation of the very nature of the law established by the Treaties.
86. In that regard, the Court has stated that the principle that a Member State is obliged to make good damage caused to individuals as a result of breaches of European Union law for which it is responsible applies to any case in which a Member State infringes European Union law, whichever is the authority of the Member State whose act or omission was responsible for the breach, and that principle also applies, under specific conditions, to judicial bodies ...
87. It must be added that, where European Union law is infringed by a national court, the provisions of Articles 258 TFEU to 260 TFEU provide for the opportunity of bringing a case before the Court to obtain a declaration that the Member State concerned has failed to fulfil its obligations ..The IPKat considers this entirely correct and also believes that this outcome was foreseeable from the start: aiming to get the UPLS accepted within the current EU framework was a bit like aiming a Mini at a brick wall and driving at it at full speed in the hope of finding a gap in it. Merpel's still not clear who exactly wanted the new system anyway, apart from the Commission, since everyone seemed to have different reservations to it.
88. It is clear that if a decision of the PC were to be in breach of European Union law, that decision could not be the subject of infringement proceedings nor could it give rise to any financial liability on the part of one or more Member States.
89. Consequently, the envisaged agreement, by conferring on an international court which is outside the institutional and judicial framework of the European Union an exclusive jurisdiction to hear a significant number of actions brought by individuals in the field of the Community patent and to interpret and apply European Union law in that field, would deprive courts of Member States of their powers in relation to the interpretation and application of European Union law and the Court of its powers to reply, by preliminary ruling, to questions referred by those courts and, consequently, would alter the essential character of the powers which the Treaties confer on the institutions of the European Union and on the Member States and which are indispensable to the preservation of the very nature of European Union law".