Third parties that wish to remove the effects of patents may:
- file a pre-grant opposition (see 1.2 Grant Procedures); there is no standing requirement for lodging an opposition;
- use post-grant revocation procedures (see 1.7 Third-Party Rights to Participate in Grant Proceedings); there is no standing requirement for filing a revocation request;
- ask for declaration of non-infringement (see 2.7 Interim Injunctions); the court shall not grant the declaration unless the applicant gave the patentee full particulars of the product or process s/he wishes to use and the respondent has refused to make it or has not made it within a reasonable period; ot
- in theory, file an application for compulsory licence (see 2.12 Representative or Collective Action).
Notably, an application for compulsory licence provides remedy to the applicant and does not result in the revocation or narrowing of the patent. This procedure has not been used since the early 1990s.