Legal analysis: The requirements of patent application priority are as follows: 1. Patents applying for foreign priority include invention patents, utility model patents and design patents; .2. Patents applying for domestic priority include invention patents and utility model patents; 3. To apply for domestic priority, the first application must be a formal application accepted by the patent administration department of the State Council and given the priority date.
Legal basis: Article 30 of the Patent Law of People's Republic of China (PRC) stipulates that an applicant who claims priority shall make a written statement at the time of application and submit a copy of the first patent application document within three months; Failing to submit a written statement or a copy of the patent application documents within the time limit shall be deemed as not claiming priority.