Third-party observations
Under Article 115 of the European Patent Convention (EPC), anyone can submit observations on the patentability of a published European patent application. This helps ensure that only truly patentable inventions are granted.
Even if you are not involved in the proceedings, you can share your views in English, French or German on why a patent application should not be granted. Your observations will be added to the application file and communicated to the applicant.
Submit third-party observations
Use this form to submit your observations free of charge.
Quick guide to the third-party observations form
More information
You can use our demo form to practice filling in the third-party observations form without submitting any data.
The legal framework for observations by third parties is described in more detail in section E-VI, 3 of the latest EPC guidelines.
Challenging competitors’ patents: three times to act
Learn when to challenge a competitor’s patent – from submitting observations and filing oppositions to seeking revocation.