Question 9. How to maintain the validity of invention patent/utility solution patents?

Invention patents shall each have a validity starting from the grant date and expiring at the end of 20 years after the filing date.

Utility solution patents shall have a validity starting from the grant date and expiring at the end of 10 years after the filing date.

In order to maintain the validity of an invention patent or a utility solution patent, its owner shall have to pay annual validity maintenance fee.