1 On 1 January 2021 the EPC was in force in a total of 38 states: Albania, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Monaco, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom, plus the available extension/validation states as of November 2021 which are: Bosnia & Herzegovina, Montenegro, Moldova, Morocco, Tunisia, Cambodia.
2 An up-to-date list of the EU member states that are participating in enhanced cooperation to bring about the Unitary Patent system and those participating states that have ratified the Agreements and thus will participate in the UP from the start can be found on the EPO website.