If the fee is not paid at the end of the last valid year, the Patent Office will issue a payment notice in time, probably within 1 month after the annual media date. You have the opportunity to pay late fees from the end of the last valid year to the next 6 months. After this period, about 7 or 8 months later, a patent right termination notice will be issued. Within two and a half months (approximately) after this notice, you can pay the rights restoration fee, go through the restoration procedures, and then Plus late fees, there is a chance that the patent rights can be restored.