https://www.epo.org/en/service-support/faq/applying-patent/procedure/i-have-filed-international-pct-application-and-want
I have filed an international (PCT) application and want to enter the European phase. What should I do?
In order to initiate the European phase you must fulfil a number of requirements within 31 months of the filing date or, if priority has been claimed, the earliest priority date. More details can be found on the EPO website.
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