https://www.epo.org/en/service-support/faq/law-practice/unitary-patent/requesting-unitary-patent/when-and-which-european
When and for which European patents can a Unitary Patent be requested?
A Unitary Patent may be requested for any European patent granted on or after the date of application of Regulations (EU) No 1257/2012 and (EU) No 1260/2012. These two regulations took effect on 1 June 2023, the date of entry into force of the Agreement on a Unified Patent Court (UPCA).
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