Taiwan: TIPO provides remarks on time limits in invalidation proceedings

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Taiwan: TIPO provides remarks on time limits in invalidation proceedings

ales-krivec-zmzhcvivgbg-unsplash.jpg

Yen-Bin Gu of Saint Island Intellectual Property Group explains how TIPO has reacted to the regulations introduced to counter lengthy invalidation actions

Under the old Patent Act, a supplementary invalidation brief, evidence, a counter-statement, and/or amendment of claims could be filed at any time before Taiwan’s Intellectual Property Office (TIPO) issued a decision.

In order to prevent an invalidation action from dragging on for too long, TIPO has included a rigid timeframe in the new Patent Act that was implemented and enforced since last year. 

After taking stock of the situation brought about by the stringent time-constraint requirement over a year, TIPO has provided some remarks: 

1. The new stipulation that an invalidation petitioner must submit supplementary briefs and/or evidence within three months from the date that the invalidation action is filed, or within one month from the receipt of any notification from TIPO, has been and will be strictly observed. In this context, any supplementary evidential materials that are filed late would not be taken into account except if they are filed at the request of the responsible examiner to clarify the circumstances of the case.

2. Filing amendment of claims in an invalidation action is also restricted. The patentee is only allowed to conduct an amendment before a deadline designated by the examiner for submitting a counter-statement, a supplementary counter-statement or upon receipt of a notification from TIPO that there are lingering doubts to be cleared, or that the amendment filed with the counter-statement has been rejected. No time limit is imposed on the patentee only if the patent at issue is the subject of a merit lawsuit.

3. In the case that a counter-statement against an invalidation action is filed along with an amendment after a designated deadline, the contents of the counter-statement, filed prior to finalisation of the invalidation action, are to be considered. As to the amendment, it will be rejected for not being filed at an appropriate time as specified above. However, since the contents of the counter-statement filed by the patentee are drafted based on the amendment concurrently filed, the examiner will generally notify the patentee that the amendment not timely filed is rejected and the case will be examined based upon the granted claims as published. Upon receipt of such notification, the patentee may re-file the amendment and the examiner will examine it with cross-reference to the contents of the counter-statement as filed.

In view of the time limits prescribed in the Patent Act, either the invalidation petitioner or the patentee is placed under tight time pressure. It would be of much help if practitioners could assist their clients to collect useful evidential materials and develop winning strategies in the first place. 

Yen-Bin Gu

Partner

E: siiplo@mail.saint-island.com.tw

 

more from across site and SHARED ros bottom lb

More from across our site

Munich litigation boutique formed by former Taylor Wessing partners continues expansion as it seeks to cement its position in the UPC market
Yvonne Tang and Lim Siau Wen, the second and third IP specialists to sit on the firm’s management committee, say IP is ‘uniquely positioned’ to support cross-practice work
As competing firms come under common ownership, clients may care less about formal conflicts and more about how openly firms discuss them
Facing increased lateral movement and in-house competition, firms are investing in flexible billing hours and tailored career progression to improve associate retention
As the US reflects on 250 years of independence, patent lawyers say innovation is reshaping old hiring priorities, with firms seeking broader IP expertise over specialisation
The Nokia v Acer ruling in the UK suggests arbitration is moving from the sidelines towards the mainstream of global FRAND disputes - and could reshape forum strategy in the process
The Life Sciences Awards is thrilled to present the shortlist for the 2026 Americas Awards
From Türkiye to Poland and Nigeria, firms with deep local roots continue to dominate the top tier, proving that market expertise can outweigh international scale in many CEE, Middle Eastern and African jurisdictions
Former Hoyng Rokh partner Simon Dack takes a leading PMAC role as busy firms continue to jostle for position
Franck Fougere, founder and managing partner of Ananda IP in Thailand, describes how the firm has developed a reputation for patent work and why he believes IP practice is set to change
Gift this article