Taiwan: Patent Act introduces tight 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 2025

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

Taiwan: Patent Act introduces tight time limits in invalidation proceedings

In an attempt to improve examination efficiency, the amended Patent Act which took effect from November 1 2019 now prescribes tight time limits for the invalidation petitioner to file additional reasons and evidence after filing an invalidation action and the patentee to file a counter-statement or a claim amendment. This will inevitably affect the strategies that the two opposing parties may use during the proceedings of an invalidation action.

According to the amended Patent Act, supplementary reasons or evidential materials can be submitted to the IP office only within three months from the filing date of an invalidation action. The legal rationale underlying this amendment is to prohibit the invalidation petitioner from intentionally prolonging the process of an invalidation action by submitting supplementary reasons or evidence in an exhaustive manner. By the same token, the patentee is given a one-month time limit to file a counter-statement against an invalidation action, along with a post-grant amendment, if any. This one month time limit also applies when (i) the invalidation petitioner is invited by the IP office to submit his comments on a post-grant amendment as filed; and (ii) either of the opposing parties is invited to render his opinion so as to remove any of the doubts raised by the IP office regarding the reasons or evidence on file. Time extensions are available only if they are accompanied by justifiable reasons and are subject to the approval of the IP office.

The amended Patent Act also mandates that the patentee is allowed to file post-grant amendments only within the one-month time limit prescribed to submit the counter-statement, or upon receipt of a notification from the IP office that the claim amendment filed with the counter-statement has been rejected, unless the patent at issue is the subject of a merit lawsuit.

In view of the time limits prescribed in the amended Patent Act, both the invalidation petitioner and the patentee are placed under a tight schedule and time pressure. Consequently, it is possible that an invalidation petitioner may not have a chance to submit his comments on the counter-statement filed by the patentee and a patentee may need to consider whether to conduct "claim amendments" as a counter-measure at a very early stage in an invalidation action. In other words, either party may be pushed to lay all their cards on the table in one go so as to increase the chances of success.

However, if viewed from another perspective, it seems that there is still room for the two opposing parties to map out their winning strategies under the severe atmosphere of a one-off showdown. For instance, the process of an invalidation action can be dragged on by requesting interviews or oral hearings, not to mention that the invalidation petitioner is allowed to file multiple invalidation actions so long as the "res judicata" doctrine is observed. Therefore, it is worth observing closely how invalidation cases will play out under the tight time limits imposed by the new amended Patent Act.

wu-junyan.jpg

Jun-Yan Wu


Saint Island International Patent & Law Offices7th Floor, No. 248, Section 3Nanking East RoadTaipei 105-45, Taiwan, ROCTel: +886 2 2775 1823Fax: +886 2 2731 6377siiplo@mail.saint-island.com.twwww.saint-island.com.tw

more from across site and SHARED ros bottom lb

More from across our site

To mark the EUIPO having processed five million EUTM and REUD applications, Managing IP speaks to the most prolific representatives to uncover how they stay at the top of their game
The merger marks Rouse’s second M&A deal within a month, and will provide access to Arnold & Siedsma’s UPC offering
Simon Tønners explains why IP provides the chance to work with some of the most passionate, risk-taking, and emotionally invested clients
The co-leaders of the firm’s new SEP practice group say the team will combine litigation and prosecution expertise to guide clients through cross-border challenges
Boasting four former Spruson & Ferguson leaders and with offices in Hong Kong and Singapore, the IP firm aims to provide fast, practical advice to clients
Partners at three law firms explain why trade secrets cases are rising, and how litigation is giving clients a market advantage
Delegates at a conference unpicking the UK’s relationship with the UPC are hopeful of strengthened UK involvement – so should we all be
News of a litigation funder suing its co-founder and a law firm over trade secrets infringement, and a strategic hire by Womble Bond Dickinson were also among the top talking points
Managing IP’s parent company, LBG, will acquire The Lawyer, a leading news, intelligence, and data-driven insight provider for the legal industry, from Centaur Media
In major recent developments, a team of partners broke away from Taylor Wessing to form their own firm, while Kilburn & Strode made a strategic UPC hire
Gift this article