Appeal against a first instance decision: costs drivers
An appeal against a first instance patent decision restarts the clock, not the case. What drives cost is not the fact of appealing but its shape: how many grounds are raised, how much technical evidence is reopened, and whether a hearing is required. The deadline to lodge the appeal is fixed. The scope of what gets reviewed inside it is not, and that is where most of the cost sits.
What changes once the appeal is lodged
Lodging a notice of appeal does not automatically suspend the first instance decision. Unless a stay is requested and granted, the losing party may still face enforcement while the appeal is pending. Deadlines for the response and for any cross-appeal start running from service, not from filing. A team that treats the appeal window as a planning buffer usually loses part of it before the case strategy is settled.
Evidence already accepted at first instance is not automatically reopened. The appellate panel typically reviews what was argued and decided, not the whole file from the start. New evidence is admitted only in limited circumstances, and asking for that admission is itself a procedural step with its own deadline.
Steps to lodge an appeal
- Confirm the exact deadline and the forum with the registry that issued the first instance decision. Case handler.
- Identify the grounds of appeal and separate them from arguments that were already rejected on the merits. Counsel.
- File the notice of appeal within the fixed window; request a stay of enforcement in the same filing if enforcement is imminent. Counsel.
- Serve the notice on the other side through the channel the forum requires. Case handler.
- Track the response deadline set by the appellate registry and prepare for a possible cross-appeal. Counsel.
- Prepare written submissions and, where scheduled, oral argument for the hearing. Counsel and technical expert.
Who decides
The appeal is heard by an appellate panel distinct from the body that issued the first instance decision. The panel reviews the grounds raised, not the entire dispute afresh. Timing depends on whether a hearing is scheduled: a paper-only review is faster; a hearing with expert testimony adds a fixed slot to the calendar and, with it, weeks of lead time for both sides to prepare.
Cost drivers
| Driver | Effect on cost and timing |
|---|---|
| Number of grounds raised | Each additional ground widens the brief and the review; narrow appeals move faster |
| Volume of technical evidence reopened | Full re-examination of expert evidence usually requires a hearing |
| Cross-appeal by the other side | Extends the timetable and effectively doubles the submissions to prepare |
| Team or dispute spread across jurisdictions | Coordination and translation of exhibits add separate stages before the substance is reached |
| Hearing requirement | An oral hearing fixes a date on the panel's calendar and cannot be compressed once set |
| Request for a stay of enforcement | A separate interim decision must be obtained before the main appeal proceeds |
If the team behind the patent is spread across three countries, coordination between them becomes a cost driver in its own right, before the appeal itself is even argued. When the team is spread across three countries explained sets out where that particular cost originates.
The point of no return
Two moments in this procedure cannot be undone. The first is the expiry of the deadline to lodge the appeal: once it passes, the first instance decision becomes final and no later filing revives the right to challenge it. The second is the close of the evidentiary stage before the hearing: after that point, new evidence is admitted only on narrow grounds, and a request filed late is usually refused on that basis alone rather than on its merits.
Forks
If the other side files a cross-appeal, the timetable extends and both sides prepare a second round of submissions on grounds neither side raised first. If enforcement of the first instance decision has already started, the stay request becomes the priority filing, ahead of the substantive grounds. If the underlying evidence is technical and contested, expect a hearing with expert testimony rather than a paper-only review.
A similarly staged escalation appears outside patents, in disputes over tokenised assets. Dispute over minting rights step by step in detail follows the same logic of fixed deadlines and a narrower review stage, under a different registry.
Limit
This page describes the appeal procedure and what drives its cost and duration. It does not establish who actually stands behind the opposing party in the dispute, and that question sits in a different registry entirely. Counterparty in Switzerland in practice shows what can be established there and what cannot.
Verified
Reviewed for accuracy on the date this page was last updated. The stages, deadlines and forks described here reflect the public procedural rules of the forums named above; they do not extend to any specific normative reference, which is deliberately excluded from a procedural page like this one. Where the underlying dispute also touches personal data processing, see Legitimate interest assessment in practice.
FAQ
How long does appeal against a first instance decision take in practice?
Duration depends on whether a hearing is scheduled and whether the other side cross-appeals. A paper-only review is measured in months from filing to decision; a hearing with expert evidence extends that by the time needed to fix a slot on the panel's calendar and prepare for it.
Which documents are needed to start?
The notice of appeal identifying the grounds, the first instance decision itself, proof of service on the other side, and, if enforcement is imminent, a separate request for a stay filed alongside the notice.
What happens if the other side does not respond?
The appellate registry applies its own default rules; typically the appeal proceeds on the record as filed, and the panel decides without the missing submissions being taken into account.
Related publications
Opt-out and withdrawal of opt-out step by step covers the earlier procedural fork that determines which forum hears the dispute at all, before any appeal becomes relevant.
If a deadline in this procedure is close and the cost of missing it is unclear, that cost is what the next page sets out. What it costs to be wrong in this situation.