The short answer
Priority can give a later foreign application the earlier date of a first filing for the same mark. The general trademark priority period is six months. You must claim it correctly and satisfy its conditions. A first Swiss application does not automatically reserve the name worldwide during that period.
Start with the first application
Record the date of the first relevant filing, rather than the date of the eventual registration certificate. An earlier application abroad may determine when the period starts. Looking only at the Swiss registration date can therefore produce the wrong timetable and waste valuable preparation time.
Keep the application number, owner details, representation of the sign and original goods list together. These documents allow the priority claim to be checked properly. If ownership has changed, establish who is entitled to claim priority; a newly incorporated company is not simply the same applicant.
Sources: IPI: priority in international trademark applications · WIPO: Paris Convention, Article 4
Compare the sign and goods list carefully
The claim concerns the same mark and goods or services covered by the first filing. Additional products do not acquire the earlier date merely because they appear in the same later application. Partial priority can concern only the parts of the specification that actually qualify.
Place the old and new versions side by side before approving translations or additions. Highlight changes to the logo and terminology. A professional review should identify which elements can claim the earlier date. Matching class numbers alone are not a sufficient basis for that comparison.
Sources: IPI: priority in international trademark applications
Turn the deadline into a practical filing plan
Decide the territories, filing route and responsible person early. For Madrid applications, the IPI explains particular issues where the international application is intended to rely on a basic mark that is not yet registered. An intention to file or an unanswered enquiry does not replace an effective filing in time.
Have the exact deadline and required declarations checked for the chosen route. Allow time to obtain documents and answer questions. Even valid priority leaves substantive protection requirements and earlier rights relevant. The earlier date is a procedural advantage, not a promise of registration in every country selected.
Sources: IPI: priority in international trademark applications · WIPO: Paris Convention, Article 4
What you can do now
- Identify the first filing and collect its original documents.
- Check that the sign and specification in the later application qualify.
- Organise target markets, the priority claim and filing before the deadline.
Frequently asked questions
Do the six months start when the Swiss mark is registered?
No. The first relevant filing normally determines the starting point. An earlier foreign application may matter. Have the actual calculation confirmed before building the timetable around it.
Sources: IPI: priority in international trademark applications
Are foreign applications impossible after six months?
No. A later application may remain possible, but without this priority advantage. Intervening rights and other protection requirements must then be assessed using the actual dates.
Sources: WIPO: Paris Convention, Article 4