When does the patent application start? Do you want to start with the document or get the certificate first? Thank god, help me.

According to Article 28 of the Patent Law, the date when the patent administrative department of the State Council receives the patent application documents is the filing date. If the application documents are mailed, the postmark date of mailing shall be the application date. The date of filing is of great legal significance: it determines the time of filing an application. According to the principle of applying first, when there are multiple applications with the same content, the order of application determines who will be granted the patent right; It determines the retrieval time limit of the existing technology, which is of great significance in determining whether the application can be patented or not during the examination; The application date is the start date of a series of important deadlines in the review process.