Guidance

Opinions manual

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

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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.