Requesting an opinion

Anyone - including the patent owner - can make a request for an opinion regarding infringement of a patent or the validity of a patent. Your request must relate to a UK patent or a European patent which designates the UK, whether it is in force or not.

To file a request, you need to complete and send us:

  • 2 copies of form 17 PDF document(20Kb) with the fee of GBP £200
  • 2 copies of a statement setting out in full the facts of your case and your arguments or analysis with reference to which claims of the patent you would like the opinion to cover
  • 2 copies of any evidence or other documents you refer to in your statement, (translations should be provided for any documents not in English or Welsh).

You also need to tell us about:

  • any UK or EPO proceedings, which are either underway or have been completed and which relate to the patent
  • anyone who you know to have an interest in the opinion so that we can send them copies of your request

Any documents you send to us will not be treated as confidential.