12.4.3 Standing to bring invalidation proceedings Since invalidation proceedings can be exercised by anyone with a legitimate interest in doing so, such proceedings are termed public by law,41 unless brought by a person not authorized to do so, in which case such standing is reserved for persons able to claim ownership.42 An action for invalidation may be brought during the entire validity period of a patent and during the five years after the expiry of the rights.43 Article 103(1) of LP-2015: “Actions impugning the validity of a patent shall be made public.”Article 10(1) of LP-2015: “The right to a patent shall belong to the inventor or to their successors in title and it shall be transferable by any of the means recognized in the Law.”Article 103(2) of LP-2015: “An action for invalidation may be brought during the legal term of a patent and during the five years after its expiry.”