Dr. Thomas Escher

Chemistry, including pharmaceutical and medicinal chemistry, life sciences, biotechnology, consumer goods, polymer chemistry, electrochemistry, nanotechnology; organic chemistry including synthesis, cosmetics, construction chemistry, adhesives, materials and inorganic chemistry, including ceramics, semiconductors, coatings, electronic components, metallurgy, alloys, and chemical process engineering, including particularly 3D printing and physical and chemical processes.

Key Activities:

  • Advice on establishing IP rights portfolios of national and international patents, trademarks and designs
  • Defense of both domestic and international IP rights in opposition, invalidity and cancellation proceedings
  • Provision of technical and strategic advice in the area of both domestic and international IP rights infringement
  • Advice on and conducting of negotiations regarding out-of-court settlements in IP rights disputes
  • Preparation of infringement opinions
  • Enforces property rights in court
  • Defense and enforcement of IP rights at trade fairs
  • Representation in legal disputes prior to and at trade fairs
  • Advice on strategies for the registration of designs and trademarks
  • Representation in design matters before the design authorities and courts
  • Advice on and preparation of filing and legal dispute strategies in Asia
  • Conducting opposition and invalidity proceedings against patents
  • Advice on matters relating to research, development and licensing agreements
  • Establishment of freedom-to-operate opinions
  • Preparation of IP due diligence analyses
  • Preparation of validity opinions

Professional Background:

Degree in Chemistry at the Universities of Bielefeld, Heidelberg and Bristol (UK), doctorate – Many years’ experience in the patent department of an international consumer goods manufacturer – Patent attorney training at dompatent von Kreisler and admission as a German patent attorney – training to become a Professional Representative before the European Patent Office and admission as a European Patent Attorney, training and admission as an authorised representative before the European Union Intellectual Property Office (EUIPO).


Chamber of German Patent Attorneys (Patentanwaltskammer), epi, VPP, German Association for the Protection of Intellectual Property (GRUR), AIPPI, FICPI, Association of German Chemists (GDCh)

Additional Activities:

Tutor at the Centre d’Études Internationales de la Propriété Industrielle (CEIPI) in Strasbourg and Cologne for European Patent Law. Consultant for patent-related topics in the areas of chemistry and pharmaceuticals – Consultant for trademark-related topics – Voluntary consultation for inventors at the Chamber of Industry & Commerce in Cologne – Voluntary adviser for patent law matters at selected events at Cologne Trade Fair and Exhibition Center.

Firm Overview:

Our experts in intellectual property rights– everything from a single source

Such to ensure the successful protection of your innovations, our experts work efficiently together in the preparation and filing of intellectual property applications, the monitoring and pursual of intellectual property rights infringements, the defense of intellectual property rights, combating trademark piracy or carrying out patent or trademark searches. At dompatent von Kreisler, you get all these services from a single source. You have direct contact to your trusted attorney and their team.

What can we do for you?

  • Your own personal contact
  • Sound advice
  • Experts in all fields
  • Efficient approach
  • Prompt execution thanks to direct communication

Our strengths for your benefit

Our patent attorneys are also qualified engineers and scientists. We have experts in all relevant areas of technology and science – from biotechnology and chemistry to electronics and electrical engineering, from mechanical and automotive engineering to gene technology and pharmaceuticals, from nanotechnology, medical technology and process technology to IT, physics and software.

Of course, in addition to patent law, we can also advise and represent you in all matters concerning trademarks, utility models, designs, licence agreements and patent-related competition issues. Our experts are registered German patent attorneys, European patent attorneys, European design attorneys and European trademark attorneys.

Antonius Herbers

Antonius Herbers is the Office Managing Partner within Audit & Assurance at BDO’s Lübeck office.

Focus Areas:

– Annual and consolidated financial statement audits in line with HGB
– IFRS consolidated financial statement audits
– International group enterprises
– Medium-sized businesses
– Municipal enterprises

Industry Expertise:

– Shipping/shipbuilding/port handling
– Publishing/radio
– Mechanical and bespoke engineering
– Trade/services
– Public administration/public companies

BDO Network:

Internationality is an important aspect of the services we offer. We are a founding member of the international BDO network (1963). With nearly 68,000 employees across 158 countries, this is currently the only globally active auditing and consulting organisation with European roots. We can always offer the perfect point of contact for your needs – any subject, anywhere in the world.

Stephan Eilers

Stephan Eilers is one of the leading tax structuring lawyers in Germany. He is also managing partner of the firm and a member of our international tax group.

Stephan provides practical solutions to his clients (especially in the private equity sector) and ensures that these solutions are accepted by tax authorities – in tax audits, for example.

He specialises in all tax issues of M&A transactions, initial public offerings and similar capital markets transactions, and also advises on double taxation treaty issues, with an emphasis on the UK, US and China.

Stephan speaks German, English and French.

Recent Work:

– Advising Air Berlin on proceedings before the German Federal Fiscal Court regarding the submission of the Civil Aviation Tax Act to the Federal Constitutional Court.
– Providing continuous tax instructions for Warburg Pincus, Advent, Permira and Goldman Sachs PIA in private equity transactions.
– Advising Airbus Defence and Space on various tax matters.
– Advising DAX 30 companies in tax litigation regarding the treatment of pension reserves.
– Advising the Meyer shipyard in its acquisition of Meyer Turku.



– Universities of Bonn in Germany (Dr iur), Geneva in Switzerland and New York in the US (LLM, tax)

Professional Memberships:

– Fachinstitut der Steuerberater (Institute of Tax Advisors), Germany
– Tax commission of the Wirtschaftsrat, Germany
– Scientific committee of the Berliner Steuergespräche, Germany

Additional Responsibilities:

– Professor of tax law at the University of Cologne (2009)

About Us:

The world’s biggest international organisations rely on us to help them make the right decisions in a fast-changing world. We combine the knowledge, experience and energy of the whole firm to solve our clients’ most complex challenges, wherever and whenever they arise.

Dr. Peter Memminger, LL.M.

Peter Memminger is partner and founder of Memminger LLP. He specializes in Corporate, M&A and Private Equity. Furthermore, he advises on questions relating to Corporate Governance, D&O Liability and Litigation.

Peter Memminger was the founding member of Milbank, Tweed, Hadley & McCloy LLP Germany and built up the corporate team in Frankfurt/Main as equity partner. Prior to his role as a lawyer, he worked as an executive assistant to the board member of the investment bank JPMorgan Chase & Co. in the M&A area.

In addition to the legal practice Peter Memminger regularly speaks on M&A topics and has been teaching international law and M&A. He is also regional ambassador for the international directors’ program (IDP) from INSEAD in Germany and a member of various supervisory and advisory councils in the country and abroad.

Selected Projects

  • Family office of Prof. Dr. h.c. Roland Berger on various transactions
  • Alexander Rittweger in the sale of Loyalty Partner and various investments in start-up companies in Germany and abroad
  • Scheer Group on the acquisition of IDS Scheer consulting business from Software AG, and its reorganization in the context of an insolvency plan proceedings
  • C+S Botschen and Acton Capital Partners on the sale of mytheresa.com and Theresa Warenvertrieb to Neimann Marcus Group
  • Sky Deutschland on the acquisition of Plazamedia and a minority participation on SPORT1/Constantin Sport Marketing
  • Vitruvian Partners on the acquisition of Linimed/Fazmed Group
  • Tennebaum Capital Partners on the acquisition of König & Cie
  • Avenso AG and its shareholders on the transaction with EQT
  • Sahara/Meridian Ltd. on the acquisition of the German business of Royal Greenland
  • Lafayette Capital Partners on the acquisition of several insolvent companies and several add-ons
  • Amerigon Inc. on the public takeover of publicly listed W.E.T. Automotive Systems AG and the subsequent squeeze-out
  • Loyalty Partner and its shareholders on the sale of Loyalty Partner Holdings SA to American Express
  • The Carlyle Group und Advent International on the acquisition of HT Troplast AG and its subsequent sale to Arcapita
  • Apax on the acquisition and sale of the cosmetics manufacturer and distributor LR International

Rankings & Recognitions

Lawyer directories such as JUVE, Chambers, Legal 500, IFLR and Best Lawyers recommend Peter Memminger as the top lawyer for M&A transactions and private equity. He was appointed in 2008 to be one of the youngest equity partners of the law firm Milbank, Tweed, Hadley & McCloy.

Dr. Andre Sayatz

Specialist Attorney for Employment Law

Major practice areas
Employment law
Banking law and securities law
Souvereign and public bond matters
Commercial law


–                         law studies in Jena and Berlin
1996                  doctorate, Dr. iur.
since 2005      at Büsing, Müffelmann & Theye


since 1990

Ulf Andresen

Ulf Andresen is an international tax partner in PwC’s Frankfurt office. He re-joined PwC in 2013 after having spent more than eleven years with another Big Four firm in Germany. Before, he worked with PwC in Hamburg and Sydney from 1996 through 2002.

Ulf has substantial experience in serving multinational groups of companies in structuring their cross-border activities, assisting with the implementation of such structures in particular in post-merger integration settings, evaluating the tax accounting impact, and defending these structures in tax audits. Such tax audit activity includes the negotiation of corresponding adjustments in bilateral tax audit situations, mutual agreement/arbitration procedures under both tax treaties and the European Arbitration Convention, and/or litigation in German tax courts. He is known for his excellence in transfer pricing controversy situations. In addition to Germany, his APA experience covers Denmark, Finland, France, Ireland, Japan, Korea, United Kingdom and United States where he was involved in the local negotiations with the local tax authorities. Moreover, he is a well-known expert with respect to the taxation of permanent establishments and financial services transfer pricing.

His expertise covers the following industries: asset management, automotive including suppliers, banking, chemical, consumer goods, engineering, information technology including software, insurance, and pharmaceuticals.
Ulf holds a PhD, MBA and BA in business administration from the European Business School, is a certified tax adviser in Germany, a chartered accountant in Australia and has been a member of the International Fiscal Association for many years.

He is the co-publisher and co-author of the Permanent Establishment Handbook (Betriebsstätten Handbuch) the leading publication on PE taxation in Germany the 2nd edition of which is published in 2017. His PhD-thesis on the arm’s length standard received an honourable mention at the 2000 IFA Congress.


With offices in 158 countries and more than 236,000 people, we are among the leading professional services networks in the world. We help organisations and individuals create the value they’re looking for, by delivering quality in assurance, tax and advisory services. Some facts about PwC:

– In FY17, PwC firms provided services to 419 companies in the Fortune Global 500 and more than 100,000 entrepreneurial and private businesses.
– 59,252 people joined PwC firms around the world in FY17.
– For the year ending 30 June 2017, PwC’s gross revenues were US$37.7 billion, up 7% on the previous year.