When the opt-out window is closing on a family: what to do first
When an opt-out window is closing across a patent family, the first task is to list every classical European patent in that family that still qualifies for opt-out, confirm that none of them is already the subject of a national or Unified Patent Court action, and file the opt-out for every qualifying member together, before the window shuts.
The legal basis
The transitional arrangement sits in the Agreement on a Unified Patent Court, read together with Regulation (EU) No 1257/2012 and Council Regulation (EU) No 1260/2012. Together these three instruments created the unitary patent, fixed its translation regime, and gave the Unified Patent Court jurisdiction that runs alongside national courts for classical European patents during a transitional period. The Agreement entered into force on 1 June 2023, and the transitional period for classical European patents runs from that date.
A single classical European patent is treated as one filing for opt-out purposes. Lodging the opt-out removes that patent from the Court's jurisdiction across every state where it has been validated, without a separate filing per country. A family, however, is not one patent. It is several patents, sometimes several dozen, each with its own record and its own opt-out status.
What changes once the window shuts
Once the window closes for a given patent, or once any party lodges an action concerning that patent, the possibility to opt out is lost for that patent specifically. Each patent in a family is judged on its own record, not on the family's record as a whole. A family with mixed status, some members opted out and some not, ends up defending the same invention in different fora at the same time, with different rules of procedure and different timetables running in parallel.
| Status of a family member | Can it still opt out | What happens next |
|---|---|---|
| No action lodged, window still open | Yes | File now, in the same batch as the rest of the family |
| Action already lodged nationally or at the Unified Patent Court | No | That member stays with the forum where the action was lodged |
| Unitary patent, not a classical European patent | No opt-out exists for this category | It falls under the Court's jurisdiction by default |
What to do, in order
- Ask patent counsel to pull the full family register and mark which members are classical European patents versus unitary patents.
- Check the litigation status of every member for a pending national or Unified Patent Court action, since a pending action closes that member's window on its own.
- Verify the ownership chain and the signatory authority for each right holder named on the family, before any filing goes out.
- File the opt-out for the whole qualifying family in one batch, not member by member, to avoid a gap opening between filings.
- Keep a registry receipt for every filing as proof of the date lodged.
- Set a calendar check on the register to catch any change in status across the family after filing.
If ownership tracing turns up a gap, When freelancers signed nothing and the deadline it opens follows a similar pattern for a broken chain of title.
Who decides
The right to opt out belongs to the patent proprietor, not to a licensee and not to a single co-applicant acting alone. Where proprietorship is split across two or more parties, every named proprietor must act together on the filing; a single holdout blocks the opt-out for that patent, even if the rest of the family is ready. A dispute over whether an opt-out was validly lodged is decided by the Unified Patent Court itself, under the Agreement on a Unified Patent Court, on the registry record of who filed and when.
If your situation differs
If the family includes a unitary patent, that member cannot opt out under any circumstances. The unitary patent and the classical European patent are governed by separate regimes under Regulation (EU) No 1257/2012, and no filing changes that.
If an action has already been lodged against one family member, that member is locked into its current forum, but the remaining, unaffected members can still be opted out separately and on their own timetable.
If a family member's specification incorporates a document by reference and that document later disappears, a related but separate clock starts running. When the referenced work is removed and the deadline it starts runs on a similar logic, worth checking if the family includes software-adjacent claims.
Limits and sources
This page does not state the exact closing date for a specific patent's transitional period; that date is fixed by the Agreement on a Unified Patent Court and should be confirmed against the register entry for that patent. It does not draft the opt-out filing itself, and it does not cover a family that includes a supplementary protection certificate, which follows separate rules not addressed here.
The material above relies on the Agreement on a Unified Patent Court, Regulation (EU) No 1257/2012, and Council Regulation (EU) No 1260/2012, all in force since 1 June 2023. It was checked against the register on the date shown in the site footer.
Retention: the report, the extracts and our copy and how long we keep them are set out separately, including the filing receipts referred to above.
If a dispute over the same family also involves a counterparty on the other side of a Latvian contract, see Counterparty in Latvia step by step for what a due-diligence report on that counterparty can establish.
Related situations
A comparable deadline appears in a different corner of the same practice. See What to do first in this situation step by step guide, for a supplier accused of infringing a third party's rights while its own window is still open.
Frequently asked questions
What is the first step when the opt-out window is closing on a family?
List every classical European patent in the family, check each one for a pending action, and file the opt-out for the whole qualifying group in a single batch.
Which deadline is already running?
The transitional period under the Agreement on a Unified Patent Court has been running since 1 June 2023. The exact date it closes for a specific patent is not stated here and should be confirmed against that patent's own register entry.
Who decides, and on what evidence?
The proprietor decides whether to file, based on the family's litigation status and ownership chain. A challenge to whether an opt-out was validly lodged is decided by the Unified Patent Court on the registry record.