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‘My technical thoroughness and legal understanding make for strong patents.’
Peter de Lange

Peter de Lange

  • Chemistry
  • European and Dutch Patent Attorney, European Patent Litigator
  • Senior Associate

Peter de Lange joined V.O. in 2011. Previously, he completed an internship with the European Patent Office (Boards of Appeal) while studying chemistry and law. Peter qualified as Dutch patent attorney in 2014 and as European patent attorney in 2015.

His technical expertise is broadly in the field of chemistry and nanomaterials. Applications handled by him relate for instance to polymers, coatings, 3D printing, and inorganic and physical chemistry.

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Peter took a BSc in chemistry and MSc in Nanomaterials (2011) and also obtained a degree in law (LLM cum laude in 2011, next to an LLB). For his law degree, he took graduate courses on European patent law, corporate law, insolvency law and international commercial arbitration.

Peter’s approach is characterized by up-to-date knowledge of procedures and case law and current insight into legal developments such as the unitary patent. In addition, he is eager to learn about new technologies.

In his capacity as European Patent Litigator, Peter is allowed to act as UPC representative.

Working experience

  • Patent Attorney, V.O.

Education

  • MSc in Chemistry, Utrecht University (2011)
  • LLM in Law, Utrecht University (2011, cum laude)

Directories

  • Recognized as ‘Notable Practitioner’ (2022 – 2026) by Managing IP

Publications

  • P. de Lange, ‘The modern problem-solution approach’, epi information, issue 2-2021
  • P. de Lange, ‘Novelty, added subject-matter, and the ‘gold standard’, epi information, issue 4-2020
  • Co-author Visser’s Annotated European Patent Convention ed. 2018, 2019, Kluwer (the only regularly updated authoritative article-by-article commentary in English on the European Patent Convention).
  • Contributor to Visser’s Annotated Patent Convention, the 2018 Edition, previously known as the Annotated European Patent Convention, published 15 December 2018.
  • P. de Lange ‘De apothekersvrijstelling in de ROW (alsnog)’, IE-Forumnl 14.02.2019 (IEF 18232).
  • ‘The core of Rule 137(5) EPC is non-unity, not forbidding claims for unsearched subject-matter’, epi Information, June 2018.
  • “Overdracht en overdraagbaarheid van prioriteitsrechten in de ROW” , Berichten IE, July 2018.
  • Co-author review article ‘ Patent law 2016’, BIE March/April 2017.
  • Article ‘ Priority in the Dutch Patent Act: too strict requirements and not enough protection in view of the PLT’, BIE December 2015.
  • Co-author of article ‘The Enlarged Board of Appeal opts for a restricted application of Art. 84 EPC in opposition’, BIE May 2015.
  • Article ‘Securing evidence across borders in EU patent litigation’, IP Value 2014.

Languages

  • English
  • Dutch

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News

G 1/25: the description must be adapted only where an inconsistency leads to non-compliance with the EPC

In G 1/25 (Enlarged Board of Appeal, 3 September 2026), the Enlarged Board of Appeal of the European Patent Office (EPO) decided whether, and on what legal basis, the description must be adapted when the claims are amended. The decision resolves a long-standing divergence in the case law of the Boards of Appeal and builds […]Continue reading

UPC clarifies lack of entitlement as a ground for revocation under Article 138(1)(e) EPC 

In UPC_CFI_523/2025, Wittenstein SE v Vestas Wind Systems A/S, the Court of First Instance, Central Division (Section Munich), decided on 2 September 2026 how lack of entitlement may operate as a ground for revocation under Article 138(1)(e) EPC. The Court held that it is not sufficient for a claimant to establish rights to only part […]Continue reading

UPC Court of Appeal on added matter: intermediate generalisation requires a functional or structural link

In UPC_CoA_884/2025, Court of Appeal, 13 August 2026, the Unified Patent Court (UPC) considered when omission of a feature from an embodiment amounts to an unallowable intermediate generalisation. The decision clarifies the relationship between the general added-matter test, the concept of intermediate generalisation and the question whether an omitted feature is essential to the invention.Continue reading

Events

2026 AIPPI World Congress

Congress Center Hamburg, Congressplatz, Hamburg, Germany

The annual AIPPI World Congress, held in September or October, is the only time of year when members from around the world come together to discuss current issues in the field of intellectual property.

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