Do I have to pay if the patent application is unsuccessful? How much does it usually cost, including what expenses?

The patent application procedure starts after the applicant receives the acceptance notice and pays the corresponding application fee, which must be paid when applying for a patent. Invention 900, practicality and appearance 500; After entering the examination, if it does not meet the authorization conditions stipulated in the patent, it will be rejected, that is, the application is unsuccessful. Then there are two situations, one is to give up the application directly without paying any fees; The second is to file a reexamination request (an invention patent) at a cost of 2,500 yuan.