What are patent maintenance fees and when do they need to be paid?

Many countries require the payment of periodic maintenance fees to maintain the validity of patent applications or registrations.  In Canada, maintenance fees are payable annually on the anniversary of the Canadian filing date, starting on the second anniversary.  The fees themselves payable to the patent office range from $50 for a small entity for the first few years upwards through several hundred dollars towards the end of the patent term.  We can assist you with monitoring and payment of maintenance fees.