The
European Patent Convention (
EPC), also known as the
Convention on the Grant of European Patents of 5 October 1973, is a multilateral
treaty instituting the
European Patent Organisation and providing an autonomous legal system according to which
European patents are granted. The term
European patent is used to refer to patents granted under the European Patent Convention. However, a European patent is not a unitary right, but a group of essentially independent nationally-enforceable, nationally-revocable patents, subject to central revocation or narrowing as a group pursuant to two types of unified, post-grant procedures: a time-limited
opposition procedure, which can be initiated by any person except the patent proprietor, and
limitation and revocation procedures, which can be initiated by the patent proprietor only.