How many years is the statute of limitations for patent infringement?

Legal analysis: the limitation of action for patent infringement is three years, counting from the date when the patentee or interested party knows or should know about the infringement.

Legal basis: Article 62 of the Patent Law of People's Republic of China (PRC) has a limitation of action for patent infringement of two years, counting from the date when the patentee or interested party knows or should know about the infringement.