Article 105a – Request for limitation or revocation - The European Patent Convention, Convention on the Grant of European Patents – (European Patent Convention), Part V – Opposition and limitation procedure
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At the request of the proprietor, the European patent may be revoked or be limited by an amendment of the claims. The request shall be filed with the European Patent Office in accordance with the Implementing Regulations. It shall not be deemed to have been filed until the limitation or revocation fee has been paid.
The request may not be filed while opposition proceedings in respect of the European patent are pending.