Patent Act Article 71

Grounds for invalidation against invention patentAny person may request an invalidation action against an invention patent with the Specific Patent Agency under any of the following conditions:1.where there is a violation of Articles 21 to 24, Article 26, Article 31, Paragraphs 1 and 3 of Article 32, Paragraph 4 and the forepart of Paragraph 6 of Article 34, Paragraph 2 of Article 43, Paragraphs 2 and 3 of Article 44, Paragraphs 2 to 4 of Article 67, or Paragraph 3 of Article 108 of this Act;2. where the home country of the patentee does not accept the patent applications filed by ROC nationals; or3. where there is a violation of Paragraph 1 of Article 12, or where the invention patentee is not the owner of the right to apply for an invention patent.An invalidation action based on Subparagraph 3 of the preceding paragraph shall only be filed by the interested party.With respect to the grounds upon which an invalidation action is based and filed against an invention patent, the provisions in effect at the time of the patent’s approved shall govern. However, if an invalidation action is filed based on the grounds under Paragraph 4 and the forepart of Paragraph 6 of Article 34, Paragraph 2 of Article 43, Paragraphs 2 and 4 of Article 67, or Paragraph 3 of Article 108, the provisions in effect at the time of filing the said action shall govern.
中文原文 專利法第71條
發明專利權有下列情事之一,任何人得向專利專責機關提起舉發:
一、違反第二十一條至第二十四條、第二十六條、第三十一條、第三十二條第一項、第三項、第三十四條第四項、第六項前段、第四十三條第二項、第四十四條第二項、第三項、第六十七條第二項至第四項或第一百零八條第三項規定者。
二、專利權人所屬國家對中華民國國民申請專利不予受理者。
三、違反第十二條第一項規定或發明專利權人為非發明專利申請權人。
以前項第三款情事提起舉發者,限於利害關係人始得為之。
發明專利權得提起舉發之情事,依其核准審定時之規定。
但以違反第三十四條第四項、第六項前段、第四十三條第二項、第六十七條第二項、第四項或第一百零八條第三項規定之情事,提起舉發者,依舉發時之規定。

English translation for reference only; the Chinese text prevails. Not legal advice.