Opposition proceeding are open against any French trademark filing at INPI, for two months from the publication date of the trademark.
This opposition may be filed on the basis of a prior French trademark, a prior EU trademark or a prior international trademark which covers France.
Opposition costs 325 euros, to be paid by the opposing party while filing the opposition.
Once the opposition has been filed, the trademark filing party is informed of it and is granted a time period to reply with its observations.
A draft decision is then notified to both parties, who can send observations within a month.
If no observation has been sent by the parties, the draft decision becomes definitive. If observations have been sent by the parties, INPI may take them into account to change the decision. This is however fairly rare.
INPI must notify a decision within six months from the opposition date.
Parties may appeal the decision at one of the ten Appeal Court which are competent on trademark, within a month from notification of the decision.