Can the patent right be renewed when it expires?

According to Article 42 of the Patent Law, the term of the invention patent right is 20 years, and the term of the utility model patent right and the design patent right is 10 years, both of which are counted from the date of application. Unfortunately, the patent cannot be extended after it expires. Patent has entered the public domain and become an open technology with no legal effect, and anyone can implement it for free. This article explains that patent right is different from movable property and immovable property. The ownership of movable and immovable property has no time limit, but the patent right is only valid within the time limit prescribed by law. This feature of patent right is determined by its essence and purpose. The purpose of establishing a patent system is to encourage inventions through the protection and use of inventions, and it must seek a balance between the interests of inventors and the public.