In the current issue of the "Mitteilungen der deutschen Patentanwälte", patent attorney Dr Christine Cirl and attorneys-at-law Sönke Scheltz and Dr Michael Schneider have published an article entitled "Inescapable Opt-out-Trap? Scope of the blocking effect of former national proceedings with regard to the withdrawal of an opt-out of the exclusive competence of the Unified Patent Court (UPC)".

The article deals with the scope of blocking effects of national proceedings on opt-outs and their withdrawal (opt-in) before the Unified Patent Court. Based on the current UPCA guidelines and various scenarios, possible courses of action and pitfalls for patent owners and applicants are discussed.

The article was published in issue 01/2023 and is available from Wolters Kluwer.