The Unified Patent Court Agreement was signed on 19 February 2013 and the changes to the Brussels I Regulation were published on 29 May 2014. However, the UPC Agreement still needed to be ratified by a sufficient number of countries before it could commence.
Several constitutional challenges in Germany have led to a significant delay of the whole project. These issues have now been resolved and Germany was able to ratify the UPC Agreement in 2021. Accordingly, as of October 2022, the commencement of the UPC is expected on April 1st 2023 with the Sunrise period beginning on January 1st 2023.