The Unified Patent Court

For patent owners, the UPC creates two big opportunities: central enforcement and fast interim measures - and one major risk: central revocation. This article summarises the essentials and provides a practical framework for deciding (i) whether to seek unitary effect and (ii) whether to opt classic European patents out of the UPC during the transitional period.

 

1. What is the UPC?

The UPC is a court for participating EU Member States, set up to decide - among other matters - infringement and validity of Unitary Patents and (in many cases) classic European patents.

Before the UPC, enforcing a European patent frequently meant litigating separately in multiple national courts, increasing cost and complexity and risking inconsistent outcomes.

 

2. What is a Unitary Patent?

A Unitary Patent (a European patent with unitary effect) is not a new application route. It is a European patent granted by the European Patent Office (EPO) for which the patentee requests unitary effect after grant, turning it into a single right providing uniform protection across the participating UPC member states.

 

A Unitary Patent covers the participating EU states that have ratified the UPC Agreement at the time unitary effect is registered (meaning coverage can expand for later registrations as more states ratify).

 

Unitary Patents fall within the UPC system and are not subject to the “opt‑out” mechanism that applies to classic European patents during the transitional period.

 

3. What can the UPC do for patent owners?

In broad terms, the UPC enables:

• One infringement action that can lead to remedies (including injunctions) effective across participating UPC states, depending on the case and the patent’s territorial scope.
• Provisional and protective measures (including interim injunctions), offering potential leverage in urgent scenarios.
• A structured procedural framework with short deadlines, which can advantage a well‑prepared claimant.

 

4. Participating countries - why the map matters

As of June 2026, the UPC is in force for 18 EU Member States, illustrated by the UPC member states map. 

 

5. Transitional period and opt-out (classic European patents)

For classic European patents (validated nationally after grant), there is a transitional period of seven years, extendable by up to a further seven years. During this period, infringement and revocation actions may still be brought in national courts, and proprietors can opt out eligible classic European patents from UPC jurisdiction.

 

Timing is critical: an opt‑out must be filed before a UPC action is brought; once UPC proceedings begin for that patent, the opt‑out option is no longer available for it.

 

6. Strategic framework for patent owners

The UPC is not a one‑size‑fits‑all choice. Many owners adopt a portfolio segmentation approach—keeping some rights in the UPC for enforcement leverage, while opting out others to reduce central revocation exposure.

 

A. Define your primary objective

If you may need rapid, multi‑country enforcement, the UPC’s ability to provide a single forum for remedies across participating states can improve speed and consistency compared with parallel national litigation.

If you are primarily protecting a “crown jewel” patent, you may place greater weight on reducing the possibility that a single adverse validity outcome removes protection across participating states.

 

B. Weigh “central enforcement” vs “central revocation”

Upside (enforcement leverage): one infringement action can potentially deliver multi‑state effect within the UPC territory.

Downside (revocation exposure):centralised validity challenges mean an adverse outcome can have pan‑territory consequences across participating states.

 

Practical implication: keeping a classic EP within the UPC can increase enforcement leverage, but also increases the strategic impact of a validity counterattack.

 

C. Choose the right “vehicle”: Unitary Patent vs classic EP bundle

When deciding whether to seek unitary effect, consider:

• Territory: Unitary Patent coverage is limited to participating/ratifying states at the time of registration; classic validation remains necessary for non‑participating EPC states and any desired national coverage outside the system.
• Administration and cost: Unitary Patents can reduce complexity and cost by removing multiple national validation procedures.
• Litigation attitude: Unitary Patents sit within UPC jurisdiction and cannot be opted out; classic EPs may be opted out during the transitional period (subject to the rules).

 

D. Opt‑out timing: protect your options

If you want to preserve national‑court control for a particular classic EP, timing matters because:

• Opt‑out is available only before UPC proceedings start for that patent; and
• Once UPC litigation begins, the choice can be lost for that asset.

 

This is why many owners review opt‑out decisions proactively - especially where a dispute is foreseeable.

 

E. Procedural reality: be ready early

UPC proceedings are designed around a structured process and short deadlines. For patent owners, that increases the value of early preparation (for example, infringement claim charts, evidence collection, and validity risk assessment) because the pace can be unforgiving once proceedings begin.

 

7. UPC advantages and risks for owners 

Advantages:

• Potentially stronger enforcement leverage across participating states via a single action.
• Provisional measures are available, including interim injunctions in appropriate cases.
• Front‑loaded, structured procedure that can reward readiness and clarity.

 

Risks:

• Developing case law: as a newer court, precedent is still emerging, which may reduce predictability compared to long‑standing national systems.
• Central revocation exposure: a successful validity challenge can have pan‑territory consequences across participating states.

 

For more information on the workings of the UPC, please contact Tom Mahon. 

 

This briefing is for general information purposes only and should not be used as a substitute for legal advice relating to your particular circumstances. We can discuss specific issues and facts on an individual basis. Please note that the law may have changed since the day this was first published in June 2026.