Patent Litigation in Mexico: 5 Essential Rules 2026

If you expect a Mexican patent fight to start in a courtroom, you are already off course. Patent litigation in Mexico begins as an administrative case before the patent office itself, and a sweeping 2020 statute changed what that office can order. For foreign owners, getting the forum and the sequence right is the difference between a fast remedy and a wasted year. Here are the five rules that matter most.

How Patent Litigation in Mexico Works

Mexico does not send patent disputes to a civil court in the first instance. Instead, the Mexican Institute of Industrial Property (IMPI) — the same agency that granted the patent — hears the case as an administrative proceeding. It looks a great deal like a trial: pleadings, evidence, expert opinions, and a reasoned decision, all before a government authority rather than a judge.

The governing statute is the Federal Law for the Protection of Industrial Property, in force since 5 November 2020. It replaced the old 1991 Industrial Property Law and modernised enforcement substantially, which is why older guides you find online are often out of date on remedies and procedure.

One consequence of this design: infringement and invalidity are both decided at IMPI. An accused infringer will typically file a counter-action asking IMPI to declare the patent void, and the office handles both threads together.

IMPI Decides First, Not a Court

This is the point most foreign owners get wrong. You do not begin by suing in a district court; you file an administrative infringement claim at IMPI. Only after IMPI rules do the courts enter the picture, and even then as reviewers of the administrative decision rather than as the first finders of fact.

1. Step one: file the administrative infringement action at IMPI.
2. Step two: the accused party usually counter-files for a declaration of nullity of the patent.
3. Step three: IMPI takes evidence and issues a resolution on both infringement and validity.

Because validity is tested in the same channel, the strength of your claims is everything. A disciplined patent invalidation search run before you move tells you whether the nullity counterclaim is a real threat or just noise.

There is a practical upside to this one-stop design. You are not shuttling between a court for infringement and the office for validity, as happens in bifurcated systems — IMPI holds both questions at once, so the record stays in a single place and the evidence on infringement and validity is weighed together. The downside is that the decision-maker is an administrative authority, and you should present your technical case as rigorously as you would to a specialist judge, because that is effectively what IMPI is acting as.

Appealing to the TFJA — and Beyond

A party unhappy with IMPI’s resolution has two routes. It can ask IMPI to reconsider through an administrative review, or it can take the decision to the Specialised Chamber on Intellectual Property Matters of the Federal Court of Administrative Justice — known as the SEPI-TFJA — which conducts a nullity trial over the administrative act.

If the TFJA decision still does not satisfy a party, the final stage is an amparo proceeding before the Collegiate Circuit Courts, Mexico’s constitutional-review forum. That is where many hard-fought patent matters are ultimately settled.

1. IMPI — administrative first instance on infringement and validity.
2. SEPI-TFJA — the specialised IP chamber reviews IMPI’s resolution.
3. Collegiate Circuit Courts — final amparo (constitutional) review.

Preliminary Injunctions and Border Measures

The 2020 law strengthened the provisional measures a patentee can request at the outset of a case. IMPI can order infringing goods pulled from circulation, seize them, shut down the offending activity, and secure evidence — relief that can be requested before the full merits are decided, subject to a bond.

Border enforcement works alongside this. IMPI coordinates with the customs authority to detain suspected infringing imports, which is often the fastest practical way to blunt a flood of copied product entering through Mexican ports. Speed here matters more than in many other systems because inspection visits and seizures can land early.

To obtain provisional measures you will generally need to show that you own a valid right, that infringement is likely, and that delay risks hard-to-repair harm — and you will usually be asked to post a bond to cover the other side if your claim ultimately fails. Handled well, these early orders change the economics of the dispute overnight, because an infringer whose stock has been seized has every reason to settle rather than fight for three more years.

Remedies and Damages Under the 2020 Law

The biggest change the Federal Law brought is who quantifies your loss. Under the old regime, a patentee generally had to win at IMPI and then start a separate civil suit to recover damages — two proceedings, years apart. Now IMPI itself can determine and award compensation within the administrative action.

• Orders to stop the infringing manufacture, sale, and import.
• Damages set by IMPI, no longer requiring a wholly separate civil case first.
• A statutory floor: compensation of at least 40% of the value of the infringing goods or services.
• Fines and publication of the decision at the infringer’s expense.

That 40% floor is a meaningful stick. It gives a patentee a credible number to point to in settlement talks, rather than the uncertain, slow damages inquiries that characterise some other jurisdictions. Compare the very different, court-driven damages model in our guide to patent litigation in Canada.

There is a sequencing point worth stressing. A declaration of infringement from IMPI is the foundation for everything that follows — the monetary award, the publication order, the fines — so the administrative action is not a preliminary skirmish you can treat lightly. It is the main event. Build the full evidentiary record for it from day one, because a thin filing at IMPI cannot be rescued later by a strong argument on appeal; the TFJA reviews the decision on the record that was already made.

Timelines, Cost, and What Foreign Filers Should Do

A first-instance administrative proceeding at IMPI commonly runs eighteen to thirty-six months, depending on complexity, with the TFJA and amparo stages adding further time if the case is appealed. It is more compact than a full civil trial in many countries, but it is not quick, and the review layers can extend a determined fight considerably.

Mexico is outside the European Patent Convention, so there is no shortcut by validating a European patent here — protection comes from a national filing or the PCT national phase, which must be entered by the 30-month deadline. If you have not secured rights yet, start with how to file a patent in Mexico and keep your docket tight, as we explain for related deadlines in Mexico’s trademark docketing rules.

This article is general information, not legal advice; consult a qualified attorney for your situation.

How PerspireIP Can Help

Winning at IMPI turns on two reports: whether the competitor truly reads on your claims, and whether those claims survive the nullity counterclaim. PerspireIP delivers the infringement analysis and invalidity and prior-art searches that decide these cases. Explore our Mexico services or contact our team to scope your matter.

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