The term of patent right refers to the expiration and termination time of the legal term of patent right, and the term of patent protection is calculated from the date of application. Where an application for a patent for invention has undergone substantive examination, and an application for a patent for utility model or design has undergone preliminary examination, and no reason for rejection is found, the Patent Office shall make a decision to grant the patent right, issue a patent certificate, and register and announce it in the patent register and special issue at the same time. The patent right shall take effect as of the date of announcement.
legal ground
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 counting from the date of application. After the expiration of the patent right, the patent right shall be terminated. Before the expiration of the patent right, the patentee may declare in writing that he will give up the patent right.