European Patent Attorney, Swiss Patent Attorney, German Patent AttorneyFirst IP-experiences were in the patent department of Boehringer Ingelheim GmbH and in law firms in Cologne and Munich. In 2004 he founded his own patent law firm and started a cooperation with Ritscher & Partner AG in Zurich, which firm he acquired in 2013 and which he transferred 2025 together with his team to the patent law firm IPrime Rentsch Kaelin.
André studied chemistry and mathematics at Midwestern State University in Wichita Falls, Texas, USA, as well as biochemistry, organic chemistry, and chemical engineering at the University of Hannover, Germany.
His doctorate was awarded by the Max Planck Institute of Endocrinology on the synthesis of antihormones and the study of their affinity in in-vitro and animal models. He has broad industrial practice including chemical research.
His technical emphasis is on life sciences, pharmacy, organic chemistry and in particular the area of biotechnology.
Expertise
- Intellectual property law, in particular patents
- Patent litigation
- Patent strategy and consulting
- International portfolio management and support
Career and education
2025 Patent attorney and partner at IPrime Rentsch Kaelin AG
2013 Kasche & Partner AG
2005 Swiss patent attorney and partner at Ritscher & Partner AG
2004 Trademark & design attorney at EUIPO
2004 German patent attorney
2002 European patent attorney
2001 Trainee for patent attorney at a patent and legal law firm in Munich
2000 Trainee for patent attorney at a patent law firm in Cologne
1996 Patent expert in the patent department of Boehringer Ingelhiem GmbH
Office/location
Zurich
Languages
- German
- English
- Bundesverband Deutscher Patentanwälte
- EPI (Institute of Professional Representatives before the European Patent Office)
- INGRES (Swiss Association for Intellectual Property Law)
4 European Patent Attorney
5 Swiss Patent Attorney
8 Liechtenstein and Swiss Patent Attorney