Daniel Offenbartl-Stiegert
Ph.D. (Chemistry), M.Res, B.A., German and European Patent Attorney, UPC Representative Languages DE | EN Biotechnology Team Encrypted E-mail to Daniel Offenbartl-Stiegert
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T +49 89 92 40 90
E dstiegert@hoffmanneitle.com
Arabellastraße 30
81925 München
Chemist and biotechnologist with interdisciplinary scientific expertise
Daniel Offenbartl-Stiegert is a member of HOFFMANN EITLE’s Biotechnology practice group. Since joining the firm in 2020, his practice has focused on examination, opposition and appeal proceedings before the European Patent Office and its Boards of Appeal, as well as the prosecution and coordination of international patent portfolios.
He is also regularly involved in contentious patent matters, including infringement and revocation proceedings before the Unified Patent Court (UPC), the German civil courts and the German Federal Patent Court.
Daniel has an academic background in chemistry, with a particular focus on organic and biological chemistry. His doctoral research in DNA nanotechnology explored the design and application of DNA nanopores for uses including targeted drug delivery and biosensing. He also developed photoresponsive protecting groups and investigated their use in the targeted epigenetic modulation of DNA.
Daniel has co-authored several articles published in leading scientific journals, including the Journal of the American Chemical Society, Angewandte Chemie and Nature Protocols.
He values the international environment at HOFFMANN EITLE and works with a broad range of clients from industry and academia in Europe, Japan, the United States and other jurisdictions. He is also an active member of the firm’s environmental group.
In his spare time, Daniel enjoys running, practicing yoga and scuba diving.
Daniel has experience in patent litigation before the Unified Patent Court (UPC), the German civil courts and the German Federal Patent Court. The matters in which he is involved frequently form part of complex, cross-border disputes spanning Europe, North America and Japan. In addition, he advises on patent prosecution and opposition proceedings before the European Patent Office (EPO), as well as appeal proceedings before the EPO Boards of Appeal. He also assists clients with the strategic coordination of international patent portfolios. Daniel’s technical expertise spans biotechnology and chemistry, with a particular focus on nucleic acid-based technologies. His experience includes mRNA vaccines, a broad range of therapeutic technologies, and diagnostic and immunological assays.
- Ph.D., University College London (UK)
- M.Res., University College London (UK)
- M.A. (Cantab), B.A., University of Cambridge (UK)
- German Patent Attorney
- European Patent Attorney
- Representative before the Unified Patent Court
- European Patent Litigation Certificate (University of Maastricht)
- epi
- German Patent Attorney Bar Association
- BDPA
- GDCh
- J 1/24: Filing a Divisional After Grant at the EPO, HE Quarterly December 2024, Daniel Offenbartl-Stiegert and Martin Bachelin
- Device or Pharmaceutical Composition: T 1252/20 Proposes Broader Applicability of Medical Use Claims at the EPO, HE Quarterly June 2024, Daniel Offenbartl-Stiegert and Andreas Stefferl
- G 2/21: The End of “Plausibility”?, HE Quarterly June 2023, Daniel Offenbartl-Stiegert and Lasse Weinmann
- Plausibility and G 2/21; HE Quarterly December 2022, Daniel Offenbartl-Stiegert and Lasse Weinmann
Scientific publications:
- Offenbartl-Stiegert, D., et al. (2022). “A Light-Triggered Synthetic Nanopore for Controlling Molecular Transport Across Biological Membranes.” Angewandte Chemie International Edition, 61(52).
- Lanphere, C., Offenbartl-Stiegert, D., et al. (2021). “Design, Assembly, and Characterization of Membrane-Spanning DNA Nanopores.” Nature Protocols, 16, 86–130.
- Donnelly, J. L., Offenbartl-Stiegert, D., et al. (2020). “Exploring the Relationship between BODIPY Structure and Spectroscopic Properties to Design Fluorophores for Bioimaging.” Chemistry: A European Journal, 26(4), 863–872.
- Nguyen, H. P., Stewart, S., Kukwikila, M. N., Jones, S. F., Offenbartl-Stiegert, D., et al. (2019). “A Photo-Responsive Small-Molecule Approach for the Opto-Epigenetic Modulation of DNA Methylation.” Angewandte Chemie International Edition, 58(20), 6620–6624.
- Offenbartl-Stiegert, D., et al. (2019). “Solvent-Dependent Photophysics of a Red-Shifted, Biocompatible Coumarin Photocage.” Organic & Biomolecular Chemistry, 17(25), 6178–6183.
- Chidchob, P., Offenbartl-Stiegert, D., et al. (2018). “Spatial Presentation of Cholesterol Units on a DNA Cube as a Determinant of Membrane Protein-Mimicking Functions.” Journal of the American Chemical Society, 141(2), 1100–1108.