Question juridique clé
Whether the supplementary protection certificate was invalid because the underlying patent claim was allegedly invalid and the patent could not be limited in the nullity action.
Solution extraite
The lower court misapplied the patent-limitation rules; in a certificate nullity action, the court must examine whether a permissible patent limitation would remove the product from patent coverage.
Motifs extraits
Art. 24 Abs. 2 PatG governs the administrative limitation procedure only; in civil nullity proceedings, limitation of a partially invalid claim follows Art. 27 PatG. Under Art. 140k lit. e PatG, the certificate is null only to the extent the product is no longer covered after the required patent limitation.