Partner, Patent Attorney


Sarah has extensive experience in the drafting and prosecution of patent applications, predominantly in the pharmaceutical sector but with a sizeable materials chemistry practice. Sarah also has both offensive and defensive opposition experience and defended several patents covering approved medicines in the EPO’s Opposition procedure.

Areas of Expertise

  • New clinical entities
  • Salts, crystal forms
  • Formulations
  • Processes and intermediates
  • Treatment regimens
  • Combination therapies


Sarah works with both UK and international clients, chiefly pharmaceutical companies and universities in the UK and US.


Sarah has a first class MChem chemistry degree from the University of Oxford and a PhD in organic synthesis from the University of Southampton. Her doctorate research focused on the total synthesis of natural products using radical-based approaches. She spent two years conducting postdoctoral research in Southampton, and has also undertaken a research placement with a pharmaceutical process chemistry team. She joined Mewburn Ellis LLP in 2011, qualifying as both a Chartered Patent Attorney and European Patent Attorney, and became a Partner in 2019.

Sarah has previously spent one year on a part-time secondment with the in-house IP department of a FMCG company and three months based in the offices of boutique IP firm in Boston.


Sarah has been listed as a "Key Lawyer" in the 2022 edition of The Legal 500, and was ranked in Managing Intellectual Property: IP Stars 2018 as a 'Rising Star'.

Client feedback : “Your contributions to the big picture and providing a European perspective were invaluable”. - Vanessa Appleby – Clovis Oncology