Article 52

1. An EU trade mark shall be declared invalid on application to the Office or on the basis of a counterclaim in infringement proceedings:

(a) where the EU trade mark has been registered contrary to the provisions of Article 7;

(b) where the applicant was acting in bad faith when he filed the application for the trade mark.

2. Where the EU trade mark has been registered in breach of the provisions of Article 7(1)(b), (c) or (d), it may nevertheless not be declared invalid if, in consequence of the use which has been made of it, it has after registration acquired a distinctive character in relation to the goods or services for which it is registered.

3. Where the ground for invalidity exists in respect of only some of the goods or services for which the EU trade mark is registered, the trade mark shall be declared invalid as regards those goods or services only.