Legal analysis: The prosecution period for the crime of patent counterfeiting is five years.
Legal basis: "Criminal Law of the People's Republic of China" Article 87 Crimes will no longer be prosecuted after the following period:
(1) The statutory maximum penalty is less than five years If the statutory maximum penalty is fixed-term imprisonment of more than five years but less than ten years, ten years have passed;
(3) The statutory maximum penalty is If the person is sentenced to fixed-term imprisonment of more than ten years, fifteen years have passed;
(4) If the statutory maximum penalty is life imprisonment or death, twenty years have passed. If it is deemed necessary to pursue prosecution after twenty years, it must be reported to the Supreme People's Procuratorate for approval.