The patent laws of all countries clearly stipulate that the protection period of the invention patent right generally ranges from 10-20 years from the date of application; The term of utility model and design patent is 5- 10 years in most countries, while the term of protection of invention patent, utility model patent and design patent in China is 20 years from the date of filing, 10 years and 10 years respectively.
Therefore, the validity period of the invention patent is 20 years, but during this period, we should pay attention to paying the annual patent fee to keep the patent right valid.