When a validation deadline was missed: what to do first
A missed validation deadline does not automatically end protection everywhere it was sought. Confirm which state and which step is in default, check whether a remedy window is still open, and instruct counsel to file within it. At this stage speed matters more than a complete file.
Legal basis
Since 1 June 2023, an applicant can request unitary effect instead of validating a European patent state by state, under Regulation (EU) No 1257/2012.
Translation arrangements for that route sit in Council Regulation (EU) No 1260/2012, which sets out when a translation is required and when it is not.
Where unitary effect was requested, disputes over the patent's validity move to the forum set out in the Agreement on a Unified Patent Court, rather than to a national court.
What changes in practice
If the missed deadline concerns classical, state-by-state validation, the patent is usually treated as if it never took effect in that state once the window closes. A remedy may still exist, but it carries its own deadline and its own fee, set by the office that recorded the default, not by the applicant.
Before assuming the position is final, pull the register entry for that state. Offices record the exact date of default, and that date decides whether a remedy window is still open or already closed.
Route at a glance
| Route | What the missed deadline usually concerns | Who decides on a remedy | What the office typically expects |
|---|---|---|---|
| Classical, state-by-state validation | National translation or the associated fee | The national patent office administering that state | Evidence of the cause of the delay, filed with the remedy request |
| Unitary effect | The request for unitary effect itself, not a per-state translation | The European Patent Office, with disputes moving to the Unified Patent Court forum once effect is granted | Confirmation of whether the request was ever filed at all |
What to do now
- Ask the patent attorney of record to pull the register history for the state in question, the same day.
- Confirm whether the default was the translation, the fee, or both, and the exact date the office recorded it.
- Check whether a remedy procedure is open at that office, and note its own deadline before doing anything else.
- Instruct counsel to prepare the remedy filing together with the evidence the office requires for the cause of the delay.
- File within the remaining window. Do not wait for a complete evidence file if the window is close to closing.
If you need to reach us directly on this today, see How to reach a partner and its limits.
Who decides
The national patent office administering validation in the state concerned decides on the remedy in the classical route. Where unitary effect had already been requested, questions about the patent's validity move to the forum under the Agreement on a Unified Patent Court instead of a national office. The European Patent Office holds the underlying grant record either way.
If your situation differs
If the missed deadline was for national validation only, the remedy application goes to that state's own patent office, on its own terms and its own clock.
If unitary effect was already registered before the deadline in question, the state-by-state validation may not have applied at all. Check the register before filing a remedy request that the file did not need.
If a third party has already started acting on the lapse, preserve evidence of the cause of the delay now, not once the remedy request is drafted.
What this page does not cover
It does not set the length of a remedy window or its fee. Each office publishes its own, and it applies to a specific file, not to every case alike.
It does not address the separate ownership questions that arise when When open source is found inside a deliverable step is found inside the product built on the patented invention.
It also does not cover a related but distinct problem, the one described in When a transfer on-chain is not recorded off-chain and a party disputes ownership through a token register instead of a patent register.
Related situations
A neighbouring problem, where the other side moves first rather than a deadline being missed, is set out in When the other side files revocation first explained.
Verified
Checked against the current text of Regulation (EU) No 1257/2012, Council Regulation (EU) No 1260/2012 and the Agreement on a Unified Patent Court. Register entries for a specific state or a specific application are confirmed directly with the relevant office before any remedy filing, not assumed from this page.
Where the counterparty relying on the lapse is a United Kingdom entity, background on what can and cannot be established about it is set out separately in Counterparty in United Kingdom step by step.
Frequently asked questions
What is the first step when a validation deadline was missed?
Pull the register entry for the state in question and identify the exact date the office recorded the default. Everything else, including whether a remedy window is still open, follows from that date.
Which deadline is already running?
If a remedy procedure is available at the relevant office, it carries its own deadline, separate from the missed validation deadline itself. That second deadline is usually shorter and starts from the point the default was noticed or should have been noticed, not from the original date.
Who decides, and on what evidence?
The national patent office administering the state decides on a remedy in the classical route, based on evidence of the cause of the delay. Where unitary effect had already been requested, the question moves instead to the forum under the Agreement on a Unified Patent Court.