European Patent Office: Late-filed arguments before the Boards of Appeal

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

European Patent Office: Late-filed arguments before the Boards of Appeal

Practitioners before the EPO are aware that EPO proceedings are front-loaded. In effect, all evidence, amendments and arguments should be on file as early as possible in the proceedings. This especially applies to inter-partes proceedings, in which late-filed evidence or amendments could place other parties at a disadvantage.

The front-loading principle before the Boards of Appeal of the EPO is embodied in Article 114(2) EPC, which allows the EPO to disregard "facts or evidence" which are not submitted in due time. Articles 12 and 13 of the Rules of Procedure of the Boards of Appeal also set limits on the extent and timing of late submissions.

Generally, new facts, documents and evidence would be considered, if the filing was occasioned by an argument or a point raised by another party or in the appealed decision and could not have been filed before under the circumstances of the case. The timing of the filing is also a consideration.

Article 114(2) EPC does not mention late-filed "arguments", and many decisions of the Boards of Appeal interpreted this in a limiting manner (such as T92/92 and G4/92). Under this interpretation, late-filed arguments would always be admissible.

However, the EPO has also recognised that late-filed arguments – even if they are based on the same evidence – can substantially alter a party's case, and may place other parties at a disadvantage, in a similar manner to late-filed evidence.

We have noted a trend in a number of recent decisions from the Technical Boards of Appeal in cases in which the admissibility of late-filed arguments was at issue. In decisions T55/11 and T1621/09, a distinction is made between late-filed arguments which are a merely development of previous argumentation, or which present a completely new case. Arguments which are a development of previous argumentation are likely to be admitted, while arguments which present a completely new case may be rejected. In T1621/09, in particular, the Board applied similar considerations to late-filed arguments as had previously been applied to late-filed evidence: the timing of the arguments, the complexity of the arguments and the impact they might have on other parties to proceedings.

If late-filed arguments are to be admitted before the EPO, it appears therefore that the chances of success are greater if they are a development of previous arguments, rather than completely new arguments.

farrington.jpg

Edward Farrington


Inspicos P/SKogle Allé 2DK-2970 HoersholmCopenhagen, DenmarkTel: +45 7070 2422Fax: +45 7070 2423info@inspicos.comwww.inspicos.com

more from across site and SHARED ros bottom lb

More from across our site

Partner Rob Jacob unveils plans to offer a beginning-to-end trademark service, how to make prosecution profitable, and why IP ‘buy-in’ from the CEO stands the firm in good stead
Sponsored by CAS
CAS provides practical pointers on how intellectual property and R&D teams can work in tandem to unlock tangible benefits and avoid wasted spend
Sponsored by CAS
CAS explores how AI is transforming intellectual property, from inventorship and copyright disputes to new demands on patent attorneys
Sponsored by That.Legal
Gillian Tan of That.Legal discusses a recent decision by the Intellectual Property Office of Singapore and what it reveals about the evidential burden in bad-faith trademark claims
Attorneys at Di Blasi, Parente & Associados share how the protection of trade secrets strengthens innovation by bringing together legal practice, regulatory developments, and established international references
Jin Ooi, who joins as a partner today, said he is excited to offer a ‘rounded’ IP service as the firm deepens its litigation expertise in the UK and Europe
As generics celebrate, practitioners believe innovator companies should brace for an ‘uphill battle’ when trying to prove induced infringement
A team from Cooley shares how they overturned a massive damages award by emphasising that the opposing company’s trade secrets claims were time-barred
Sponsored by Licks Attorneys
Eduardo Hallak, Rafaella Oliveira, and Laís Souza of Licks Attorneys explain how the provision operates in practice, highlighting evidential hurdles and best practices for patent applicants
Sponsored by Liu, Shen & Associates
Chunyu Cui and Ziqing Wu of Liu, Shen & Associates say recent trends in China’s intellectual property courts indicate alignment with international standards and send a clear signal to the global market
Gift this article