Definitions for "Renewal fees"
Once a design is registered, renewal fees are payable to the Office every 5 years, up to a maximum of 25 years, to keep the design in force.
Payments that must be made by the applicant to keep the patent in force and prevent it from lapsing. Called maintenance fees in the United States.
Payments that must be made by the applicant to the patent office in order to keep the patent in force and prevent it from lapsing. In the USA, these are termed maintenance fees.