Your industrial property (IP) titles can expire and when this happens they fall into the public domain, i.e. they are no longer protected by IP laws. Your design may therefore expire for the following reasons:
In the first two grounds for revocation, the Spanish Patent and Trademark Office (SPTO) publishes the declaration of revocation in the Official Industrial Property Gazette (BOPI) and cancels the registration of the affected design(s); in the third case, the revocation is declared by the courts.
You can re-establish your rights over your design, as provided for in Art. 39 of Law 20/2003, of 7 July, the Law on Legal Protection of Industrial Designs, as well as Art. 48 of Royal Decree 1937/2004.