Stay pending validity: stages and deadlines
A stay pending validity pauses an infringement case while a separate challenge to the patent's validity runs its course. The tribunal hearing the infringement claim does not rule on infringement until the validity question is settled, because a patent that falls away removes the basis for the claim. The decision to stay is discretionary, not automatic.
Why the sequence matters
Patent litigation often runs on two tracks: an infringement claim and a validity challenge, sometimes before the same forum, sometimes before different ones. If the validity track is likely to strike down the patent, deciding infringement first risks a judgment that has to be undone later. If the validity challenge looks weak, a stay simply rewards delay. The tribunal weighs both outcomes before granting or refusing the request.
The practical effect for a business is straightforward: while the stay is in place, no injunction is granted, no damages are assessed, and the infringement case sits on the docket. Commercial uncertainty continues, but so does the freedom to keep operating without a ruling against you, if you are the party accused of infringement.
Steps to request a stay
The steps below assume a stay is sought by the party facing the infringement claim, which is the common pattern. The sequence is broadly the same when the patent holder seeks the stay, with the roles reversed.
- Identify the validity challenge. Confirm that a revocation action, opposition, or counterclaim for invalidity is already filed or ready to be filed. A stay request without an underlying challenge is usually refused outright.
- File the stay application. Your counsel submits the request to the forum handling the infringement claim, setting out why the validity outcome would be decisive for that claim.
- Serve the other side. The patent holder, or the accused infringer if roles are reversed, receives the application and a deadline to respond.
- Address the balance of prejudice. Both sides submit argument on who is harmed more by a pause: the patent holder losing enforcement time, or the accused party facing a ruling on a patent that might not survive.
- Await the tribunal's order. The order either grants the stay in full, grants it in part, for example limited to the injunction while damages proceed, or refuses it.
- Track the validity case. Once stayed, the infringement file becomes dependent on a separate proceeding. Someone on your side needs to monitor that proceeding and flag its outcome promptly.
Who decides, and on what timetable
The forum hearing the infringement claim decides the stay application. It does not need to wait for the validity forum's final view; it assesses the strength of the challenge on the papers before it. In practice, a decision on the stay itself typically arrives faster than a decision on the underlying dispute, because the tribunal is answering a narrower question.
| Stage | What happens | Typical pace |
|---|---|---|
| Application filed | Party requests the stay, sets out the validity challenge | Early in the infringement proceeding |
| Response and reply | Other side argues for or against a pause | Weeks, not months |
| Order on the stay | Tribunal grants, partly grants, or refuses | Often faster than the substantive ruling |
| Validity proceeding runs | Separate forum or track decides validity | The longest stage, length varies by forum and by whether the decision is appealed |
| Stay lifted | Infringement case resumes once validity is settled | Shortly after the validity outcome is final |
The point of no return sits at the order on the stay itself. Once granted, reopening the infringement track before the validity proceeding concludes is rare and requires a change in circumstances, not simply impatience with the pace of the other case.
If your situation differs
If you are the patent holder facing a stay request, your strongest argument is usually that the validity challenge is weak or filed only to delay enforcement. Evidence of timing, such as a challenge filed shortly before an injunction hearing, carries weight.
If you are the accused infringer and the validity challenge is genuinely strong, a stay protects you from a ruling that a later validity decision would undo anyway. Weigh this against the cost of prolonged uncertainty for your own commercial planning.
A related sequencing question comes up in ownership disputes rather than validity disputes: Industrial manufacturing a contractor claims ownership of the code covers how a register handles a competing claim while a contract is still being interpreted.
A comparable clash between a recorded position and a separate agreement also arises outside patents. When an off-chain agreement contradicts metadata in detail sets out the first steps when on-record data and a private agreement point in different directions.
What this page does not cover
This page does not cover the substantive test for whether a patent is valid, only the procedural mechanics of pausing the infringement case around that test. It also does not cover how to assess data-protection grounds when evidence is gathered from a third party, such as a former co-inventor or an overseas licensee. That assessment runs on its own timeline; Legitimate interest assessment and the deadline sets out the underlying test.
Where the dispute involves a counterparty based abroad, verifying that counterparty is a separate exercise from the stay itself. Counterparty in Cyprus in detail explains what such a check can and cannot establish.
Related reading
A stay often ends in a settlement rather than a ruling on validity, once both sides see how the validity case is likely to go. The step that typically follows is covered in Settlement and licence on judgment step by step.
Reviewed
This overview reflects our review of published procedural practice on stays in patent disputes. It describes the stages and the decision points as they commonly appear across forums; it does not cite a specific statute or rule number, because the accuracy of any such reference depends on the forum and jurisdiction actually seised of your case. Confirm the current procedural rule with counsel handling the specific forum before relying on a timetable.
Frequently asked questions
How long does stay pending validity take in practice?
The order on the stay itself usually arrives faster than a ruling on the underlying dispute. The longest stage is the validity proceeding running in parallel, and its length depends on the forum, the complexity of the patent, and whether the outcome is appealed.
Which documents are needed to start?
You need the filed or imminent validity challenge, the stay application setting out why that challenge is decisive for the infringement claim, and supporting argument on the balance of prejudice between the parties. Your counsel prepares the application from these materials.
What happens if the other side does not respond?
A non-response does not stop the tribunal from deciding. It typically proceeds on the papers filed, and a party that stays silent loses the chance to argue against the pause or to shape its scope.
If a similar conflict has just started for you, read What to do first in this situation in detail for the immediate steps before deadlines start running.