Patent Act Article 72
Invalidation against extinguished patentWhere the interested party possesses recoverable legal interests due to the revocation of a patent, such an interested party may file an invalidation action after the said patent has become extinguished ipso facto.
中文原文 專利法第72條
利害關係人對於專利權之撤銷，有可回復之法律上利益者，得於專利權當然消滅後，提起舉發。