(1) Renewal fees shall be paid to the European Patent Office in accordance with the Implementing Regulations in respect of European patent applications. These fees shall be due in respect of the third year and each subsequent year, calculated from the date of filing of the application.
(2) When a renewal fee has not been paid on or before the due date, the fee may be validly paid within six months of the said date, provided that the additional fee is paid at the same time.
(3) If the renewal fee and any additional fee have not been paid in due time the European patent application shall be deemed to be withdrawn. The European Patent Office alone shall be competent to decide this.
(4) The obligation to pay renewal fees shall terminate with the payment of the renewal fee due in respect of the year in which the mention of the grant of the European patent is published.
56See instructions for paying renewal fees for European patent applications and patents (OJ EPO 1984, 272 ff).