The protection period of this patent is 10 years, counting from1February 8, 999.
Analysis: the applicant claims domestic priority, and if the earlier application is an application for a patent for invention, he can file an application for a patent for invention or utility model on the same subject; Where the earlier application is an application for a patent for utility model, an application for a patent for utility model or invention may be filed on the same subject. However, when the latter application is filed, if the subject matter of the former application is under any of the following circumstances, it shall not be used as the basis for claiming domestic priority:
(1) claiming foreign priority or domestic priority;
(2) The patent right has been granted;
(3) It is a divisional application filed in accordance with regulations.
Where the applicant claims domestic priority, the earlier application shall be deemed to have been withdrawn from the date of filing the later application. From the filing date of the later patent application, the patent document of the earlier application shall be deemed to be abandoned. The same theme here actually refers to the same content. Where the latter applies for supplementing new contents, the newly added part shall not enjoy priority.
Article 32 of the Detailed Rules for the Implementation of People's Republic of China (PRC) Patent Law, please refer to it!