PCT National Phase in Switzerland: 6 Smart Steps

Your international application buys time, not protection. If Switzerland is on your list, that protection only becomes real when you enter the PCT national phase in Switzerland before the clock runs out. Miss the date and, unlike some offices, the Swiss Federal Institute of Intellectual Property (IPI) gives you almost nothing to fall back on. This guide walks through the deadline, the languages you can file in, what IPI does and does not examine, the fees, and the strategic choice between filing directly in Bern and routing through the European Patent Office.

How the PCT National Phase in Switzerland Works

A Patent Cooperation Treaty (PCT) application is not a patent. It is a placeholder that preserves your filing date in more than 150 countries while you decide where to actually pursue protection. To turn that placeholder into an enforceable Swiss right, you enter the national phase before IPI — the office known in German as the Institut für Geistiges Eigentum (IGE) and in French and Italian as the Institut de la Propriété Intellectuelle (IPI).

One feature makes Switzerland unusually efficient: a Swiss national patent automatically protects Liechtenstein as well. Under the 1978 treaty between the two countries, Switzerland and Liechtenstein form a single unitary patent territory, so one national-phase entry covers both markets with no separate filing.

• Applicant: a foreign applicant with no Swiss residence must appoint a representative domiciled in Switzerland.
• Scope: one grant covers Switzerland and Liechtenstein together.
• Term: up to 20 years from the international filing date, subject to annual renewal fees.

The 30-Month Deadline — and Why It Is Effectively Final

The deadline to enter the national phase directly in Switzerland is 30 months from your earliest priority date. This is the single most important date in the process. It applies whether or not you filed a Chapter II demand for international preliminary examination.

Treat the 30-month date as a hard wall. Switzerland does not offer a generous safety net for a blown national-phase deadline, and reinstatement is difficult and discretionary rather than automatic. In practice, docket the date the moment you file the PCT application, then set an internal reminder several months earlier so translations and representation are lined up in advance.

If Switzerland matters to your commercial plan, do not leave entry to the final week. Late instruction is the most common way applicants lose a market they intended to keep.

Two Routes In: Direct to IPI vs the Euro-PCT Route

There are two ways to reach Switzerland from a PCT application, and the right one depends on how many European countries you want.

1. Direct national entry at IPI (30 months): best when Switzerland (plus Liechtenstein) is the only European territory you need. You get a Swiss national patent quickly and cheaply, without paying for the European grant procedure.
2. The Euro-PCT route via the EPO (31 months): you enter the European regional phase at the European Patent Office, and once the European patent is granted you obtain protection in Switzerland. This makes sense when you want several European countries, because one EPO grant serves them all.

A useful detail: when a European patent is granted, it takes effect in Switzerland without any validation translation — Switzerland accepts European patents in English, German or French. That removes one of the cost items that makes validation expensive in other countries. If you already know you want the EPO route, our guide to validating a European patent in Switzerland covers what happens after grant.

Languages, Documents and Representation

Switzerland’s official languages for patent proceedings are German, French and Italian. You may initially file in English, but you must supply a translation of the application into one of the official languages within the period IPI sets. Choosing the language early keeps the file moving and avoids a scramble near grant.

• A copy of the international application (and any amendments you want examined).
• A translation into German, French or Italian where the application was not filed in one of those languages.
• Applicant and inventor details, and appointment of a Swiss-domiciled representative for foreign applicants.
• Payment of the filing fee, plus any claims fees where the claim count is high.

Because entering the national phase in Switzerland is largely a documentary exercise, the work is front-loaded: get the translation and representation right, and the rest is administrative.

What IPI Examines — and What It Does Not

Here is the point that surprises applicants used to the USPTO or EPO. In IPI’s own words, “our experts do not examine for novelty or inventive step.” It checks technical character, patentable subject matter, sufficiency of disclosure, clarity and unity, but it does not run a substantive prior-art examination before grant (see the IPI examination guidance). A Swiss patent is therefore granted comparatively quickly.

That is a double-edged sword. Grant is faster and cheaper, but the validity of your patent has not been vetted by the office — novelty and inventive step are only tested if the patent is later challenged. So the strength of a Swiss patent depends heavily on the quality of the original PCT drafting and the international search report. Weak claims sail through to grant and then fail when it matters.

One change is coming: under Switzerland’s revised Patents Act, in force from 1 January 2027, applicants will be able to opt in to a full examination that does include novelty and inventive step. Until then, the default remains a Swiss patent granted without that substantive review.

This is exactly why a rigorous Swiss patent filing strategy and a solid prior-art position matter more here than in an office that examines substantively for you.

Fees, Renewals and Where You Enforce

IPI’s official fees are modest by international standards: a national filing fee, a separate examination fee, and a per-claim surcharge once the claim count is high, with annual renewal (maintenance) fees due from the fourth year onward and rising over the life of the patent. Attorney and translation costs usually exceed the official fees, so budget for those separately. Because the fee schedule is being revised alongside the new Patents Act on 1 January 2027, confirm current amounts on the official IPI fees page before you file.

Enforcement is where Switzerland’s independence becomes concrete. Switzerland is a contracting state of the European Patent Convention, but it is not in the European Union and is not part of the Unitary Patent or the Unified Patent Court (UPC). The UPC has no reach into Switzerland. Instead, the Swiss Federal Patent Court (Bundespatentgericht) in St. Gallen has exclusive first-instance jurisdiction over patent validity and infringement nationwide.

For an infringement or validity dispute, that single specialised court — with technically trained judges — is where your Swiss patent lives or dies. If a dispute is already on the horizon, our guide to patent litigation in Switzerland explains how those cases run.

How PerspireIP Can Help

PerspireIP helps applicants enter the PCT national phase in Switzerland on time and on strategy — coordinating translations, representation and the direct-vs-Euro-PCT decision, and backing the filing with the prior-art and drawing work that makes a Swiss patent defensible when it is challenged. Explore our Switzerland IP services, our on-the-ground teams in Zurich, Geneva and Basel, or contact us to map your national-phase deadlines.

Frequently Asked Questions