(1) can change the type of patent application;
(2) The patent application documents can be improved;
(3) New technical schemes can be added (the added part does not enjoy priority);
(4) Domestic priority can also enjoy the benefits of multiple priorities or partial priorities;
(5) The protection period can be extended by nearly one year.
The priority of patent application is a subsidiary right, if not.
Patent application
There is no priority. The claim of priority in a patent application has a certain time limit, and the claim of priority is valid within the time limit and invalid after the expiration.