Our depth of technical knowledge and our skills as advocates ensure the best possible outcome


Our success rate in European Patent Office oppositions is exceptional

We are frequently engaged by clients to file or defend against oppositions on commercially important patents. Our opposition practice covers all fields of technology, from blockbuster pharmaceuticals to memory devices, polymers to digital broadcast systems, detergents to medical devices.

Our depth of technical knowledge, combined with our skills as advocates before the Opposition Divisions and Technical and Enlarged Boards of Appeal at the EPO, ensures that our clients have the best possible opportunity to obtain their desired outcomes.

In many instances, there will be co-pending litigation in national European courts. Along with our experienced litigators, we are able to transfer technical arguments seamlessly between the EPO and the courts, and bring to bear a strategic oversight across all proceedings.

Meet the Opposition team

Aclasta EPO Opposition Defence for Novartis

Aclasta is Novartis’ commercially successful zoledronic acid product for the once-yearly treatment of osteoporosis. Despite the UK portion of the patent being previously revoked in the UK High Court and UK Court of Appeal, the Carpmaels team successfully defended Novartis’ European patent against 5 opponents in a two day hearing at the EPO.