Opinions manual

Guidance on the patent opinions service, including guidance for users of the service and our procedures for handling opinions.



The opinion service allows anyone to ask the Intellectual Property Office for an opinion on an issue of validity or infringement of a granted patent.

The procedure is designed to give parties who are involved in a dispute access to an impartial and affordable authoritative assessment of the main issues in contention.

Published 20 June 2014
Last updated 26 February 2015 + show all updates
  1. PDF manual removed, replaced by searchable HTML publication.

  2. Updates have been added following legislation changes for 1 October 2014.

  3. First published.