The Unified Patent Court and its Nordic-Baltic division: what to do in the current transitional period depends on whether a business holds European patents that can still be opted out, and whether infringement or licensing disputes touch Sweden, Estonia, Latvia or Lithuania. Doing nothing is a choice with consequences of its own.
Who this concerns
This concerns two groups mainly, and a growing number of businesses fall into both at once. The first is any Swedish, Estonian, Latvian or Lithuanian company holding one or more European patents validated in the region, whether through direct filing or a subsidiary. The second is any foreign patent holder, licensor, importer or competitor with commercial activity that touches the Nordic-Baltic market and can be reached through it. The Unified Patent Court and its Nordic-Baltic division do not distinguish between domestic and foreign parties: jurisdiction follows where the patent is registered and where the alleged infringement occurs, not where the ultimate parent company sits.
That last point matters for groups with a foreign parent, a licensing structure spread across several countries, or manufacturing outside the EU but sales inside it. A group headquartered outside Sweden that licenses a Swedish subsidiary to exploit a European patent, or that supplies into the Baltic states through a distributor, can find itself a party to proceedings before the regional division in Stockholm without ever having filed anything there itself. The practical work begins with mapping where the group's patents sit today, not where its management sits.
Read together with the firm's intellectual property and UPC practice, this page sets out what to check before the next filing, licence renewal or infringement letter goes out.
What the law says
The Unified Patent Court sits outside the ordinary Swedish court structure. It was created to give a single forum for European patents with unitary effect, alongside classical European patents that have not been opted out of its jurisdiction. The Nordic-Baltic Regional Division, seated in Stockholm, exercises that jurisdiction for Sweden, Estonia, Latvia and Lithuania; other Nordic states run their own local divisions under the same overall structure, and appeals from any division are heard by the same appellate instance.
Two consequences follow from that structure, and both are procedural rather than substantive. First, a patent holder with an existing classical European patent validated in the region normally has a choice, for a defined transitional window, to keep that patent outside the court's jurisdiction by filing an opt-out; once that window closes for a given patent, or once an opt-out is withdrawn, the choice is no longer available for it. Second, once a patent is inside the system, whether by unitary registration or by not opting out, infringement, validity and, in most configurations, revocation are argued in the same proceeding, before the same panel, under the court's own rules of procedure rather than the ordinary domestic procedural rules.
Under Swedish law as it currently stands, national courts retain competence over patents that were validly opted out and over national rights that never fell within the unitary system's scope. That residual competence is narrower than it looks: many groups discover only when a dispute is already underway that a patent they assumed was still a purely domestic matter had, in fact, already fallen inside the new structure.
How it works in practice
Auditing the existing portfolio first
Before any filing decision is made, the portfolio needs to be sorted by type: patents already granted with unitary effect, classical European patents validated in the region and not yet opted out, classical European patents that have been opted out, and purely national rights. Each category sits under a different regime, and a single licence or supply agreement can touch more than one at once.
Deciding on opt-out family by family
Opt-out decisions are commonly made family by family rather than patent by patent, because a competitor or licensee challenging one member of a family will often look at the others. A family left partly in and partly out of the court's jurisdiction is not necessarily a problem, though it should be a deliberate choice, recorded against a reason, rather than an accident of who filed the paperwork.
Choosing where infringement proceedings are brought
Where an infringement is alleged to occur in more than one Nordic or Baltic state, the regional division seated in Stockholm is usually the forum, though the claimant retains some choice over which local division hears the case where several are available. That choice affects the language of proceedings, the composition of the panel and, in practice, how quickly a preliminary injunction application is heard.
Handling licence and royalty terms that assume the old regime
Licence agreements drafted before a patent's status changed, whether by grant with unitary effect or by expiry of an opt-out, often still refer to national litigation, national damages calculations or national courts by name. Those clauses do not become void, but they stop describing the forum where a dispute over the licensed patent will actually be argued, which matters when a royalty audit or a dispute over scope is triggered.
Coordinating with national proceedings already running
Where an infringement action was already before a Swedish court when the underlying patent's status changed, the transition is not automatic in every configuration; the existing case does not simply move. Coordination between the national proceeding and the new forum needs to be checked, not assumed, particularly where a preliminary injunction is already in place.
What to check before the next filing or renewal
- Whether each patent family has an active or lapsed opt-out, and who has authority to change it
- Whether a licence, distribution or supply agreement names a forum that no longer matches where a dispute would actually be heard
- Whether a foreign parent company's litigation insurance or indemnity clauses were drafted with the Unified Patent Court's cost exposure in mind
- Whether a pending or threatened infringement claim touches more than one Nordic or Baltic state, which changes which division has competence
- Whether internal records show who decided to opt out or stay in, and on what basis, for each family
Frequently asked questions
Does an opt-out have to be filed before the transitional period ends?
Yes, for a classical European patent that has not already been the subject of proceedings within the system; once the transitional window for that patent closes, or once an action is filed anywhere in the court's system regarding it, the opt-out route for that specific patent is no longer available. The decision needs to be made with enough lead time to complete the filing, not on the last available day.
Can a Swedish company be sued in the Nordic-Baltic division for a patent it validated only in Estonia?
Yes. The regional division's competence covers Sweden, Estonia, Latvia and Lithuania as a single jurisdiction for this purpose, so a patent validated in any one of the four can be litigated through the Stockholm-seated division regardless of where the defendant is registered, provided the other jurisdictional conditions are met.
What happens to a pending national infringement case if the underlying patent is opted out after proceedings start?
An opt-out filed after national proceedings have already begun does not usually pull those proceedings into the new system, and an opt-out generally cannot be filed at all once an action concerning that patent is already pending before the Unified Patent Court. The sequencing of filings, not just their content, decides which forum keeps the case.
The numbers
There is no single fee, timeline or cost figure that applies across every matter before the Unified Patent Court and its Nordic-Baltic division, and a figure quoted for one type of case is a poor guide to another. Court fees are set at the level of the structure itself rather than by domestic Swedish law, and they combine a fixed element with a value-based element that depends on the amount in dispute; both are reviewed periodically and can change independently of anything happening in Sweden. The same applies to the cost of running proceedings in parallel across more than one jurisdiction, which depends on how many patents in a family are affected, how many parties are joined, and whether a preliminary injunction application is contested.
What can be said without a specific figure is what drives the cost up. A dispute touching several patents in a family costs more than one touching a single patent. A contested preliminary injunction application, heard on a compressed timetable, costs more than an uncontested one. A case where the other side challenges validity as well as infringement, which is common, effectively becomes two disputes decided together rather than one. Anyone budgeting for a matter should ask which of these apply before asking for a total figure.
Where it usually goes wrong
The most common failure is treating the opt-out decision as a one-off filing exercise rather than a portfolio policy, so that new patents added to a family later are opted in or out inconsistently, with no record of why. The second is assuming that because a business has no registered office or subsidiary in Sweden, Estonia, Latvia or Lithuania, it is outside the reach of the regional division; competence follows the patent and the alleged infringement, not the defendant's registered address.
A third failure sits in licensing. Royalty and audit clauses drafted for a purely national dispute rarely anticipate that a dispute over the same patent might now be argued before a panel drawn from several countries, applying the court's own procedural rules. Where a licence dispute of this kind is already brewing, questions of forum and audit scope tend to surface earlier than the parties expect, and earlier than the licence agreement was drafted to handle.
The fourth failure is procedural rather than strategic: missing the point at which an opt-out is no longer available because proceedings have already started somewhere in the system, sometimes brought by a third party unconnected to the patent holder's own dispute. Once that door closes, it does not reopen for that patent, whatever the reason for missing it.
None of this is a reason to opt out reflexively, or to stay in reflexively. It is a reason to make the decision with the portfolio in front of someone, family by family, rather than by default.
What to do next
Reading this far covers the structure and the recurring failure points; it does not tell a specific business whether a specific patent family should be opted out, or whether a specific licence clause still points at the right forum. That is where independent reading stops being useful and a review of the actual documents, family by family, needs to start.
Lodline's work on proceedings before the Patent and Market Court sits alongside this question directly, for the cases that stay inside the Swedish system rather than moving into the Unified Patent Court's structure. Where the question is closer to a live dispute or an upcoming filing deadline, the next step is a portfolio assessment call.