Home » UPC decisions » Luxembourg Court of Appeal » Court of Appeal, August 17, 2026, Order on Permissibility and Appeal of Conditional Counterclaims for Revocation, UPC-CoA-40/2026, UPC-CoA-123/2026

Court of Appeal, August 17, 2026, Order on Permissibility and Appeal of Conditional Counterclaims for Revocation, UPC-CoA-40/2026, UPC-CoA-123/2026

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Key takeaways

Since the infringement action and the counterclaim for revocation are adjudicated in separate proceedings, a condition linking the counterclaim to the outcome of the infringement action qualifies as inter-procedural rather than intra-procedural. As a result, the defendant cannot rely on a cross-appeal under Rule 237 RoP to pursue the counterclaim, but must instead lodge a separate appeal against the first-instance decision.

Nothing in the UPCA or Rules of Procedure excludes conditional counterclaims per se. Under the principle of party autonomy, parties are free to define the subject-matter of their case and limit their claims conditionally. Making a counterclaim conditional does not alter the claims themselves but merely restricts the circumstances under which the Court must decide on their merits, and is therefore not a withdrawal. Rule 263.3 RoP applies by analogy, and the counterclaim remains pending during the appeal period.

Unless explicitly restricted to the first instance, a condition referring to “the Court” means a final finding of infringement. Thus, if the claimant appeals a non-infringement finding, the defendant’s conditional counterclaim remains pending and can be appealed.

If the Court of Appeal finds infringement, it will decide the undecided validity issues itself rather than referring the case back. Undecided issues due to an unfulfilled condition are treated as issues the first-instance court “failed to decide.”

Division

Court of Appeal

UPC number

UPC-CoA-40/2026, UPC-CoA-123/2026

Type of proceedings

Request for review (Rule 333 RoP) and application for re-establishment of rights (Rule 320 RoP) in parallel infringement and counterclaim for revocation proceedings

Parties

Counter-claimant / Defendant at first instance: AorticLab, srl

Counter-defendant / Claimant at first instance: Emboline Inc.

Patent

EP 2 129 425

Body of legislation / Rules

R. 220.1(a) RoP, R. 237 RoP, R. 242.2(b) RoP, R. 263.3 RoP, Art. 2 UPCA, Art. 6 UPCA, Art. 32(1) UPCA, Art. 75(1) UPCA


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  • Dr. Janina Ertmer, German and European Patent Attorney, Senior Associate at BARDEHLE PAGENBERG

    German and European Patent Attorney, UPC Representative, Senior Associate

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