Senior Associate, Patent Attorney


Our People

Our IP specialists work at all stage of the IP life cycle and provide strategic advice about patent, trade mark and registered designs, as well as any IP-related disputes and legal and commercial requirements.

News & Insights

We want to keep you up to date with developments in the IP world and let you know what we are up to at Mewburn Ellis.

Read our blogs

Law & Practice Guides

We believe in making it easy for you to find the information that you want – and you can always contact us if you can’t find what you need.

Read our Law and Practice guides

Posts by Author

Blogs by Author

Callum is experienced in the drafting and prosecution of patent applications within our chemistry practice group before the European Patent Office and worldwide. He represents clients in oppositions and appeals at the EPO and has experience conducting extensive freedom to operate analyses. He currently has a particular interest in the rapidly developing medicinal cannabis and cannabinoid ‘wellness’ sectors.

Areas of Expertise

  • Polymers and polymer manufacture, particularly polyethylene
  • Battery materials, particularly lithium ion battery materials
  • Fuel cells
  • Catalysts
  • Inorganic materials, in particular glasses and alloys
  • Small-molecule pharmaceuticals including antibiotics, antibody-drug conjugates and cancer therapeutics


Callum works with a number of large multinational chemical companies including polymer manufacturers, consumer products companies and speciality chemicals companies, as well as smaller local clients.


Callum has a Master’s degree in chemistry from Oxford University, which included a year of research focusing on spectroscopic and computational studies of small gas-phase transition metal clusters. He joined Mewburn Ellis LLP in 2012, qualifying as a Chartered Patent Attorney and European Patent Attorney in 2016. He completed a three-month secondment to a US law firm, gaining insight into US patent practice, and currently spends two days each week on secondment to a multinational chemical company.


Named as a ‘Rising Star’ in the Managing Intellectual Property’s IP Stars 2018, 2019.