How long does it take for patent approval ~

After receiving an application for a patent for invention, the Patent Office shall, after preliminary examination, make a public announcement within 08 months from the date of application. Within 3 years from the date of application, the Patent Office may conduct substantive examination at any time according to the request of the applicant; If the applicant fails to request substantive examination within the time limit without justifiable reasons, it shall be deemed to have withdrawn the patent application. If the patent for utility model and design meets the requirements after preliminary examination, it will not be examined in substance and will be announced immediately. Within three months from the date of the announcement of the patent application, anyone may raise an objection, and the Patent Office shall send a copy of the objection to the applicant, and the applicant shall submit a written reply within three months from the date of receiving the copy of the objection. Failing to reply within the time limit shall be deemed to have withdrawn the application. If the Patent Office considers that the objection is established after examination, it shall make a decision to reject the application and notify the objector and the applicant; If the applicant is not satisfied, he may apply to the Patent Reexamination Board for reexamination within three months from the date of receiving the notice. After reexamination, the Patent Reexamination Board shall make a decision and notify the applicant. If the applicant refuses to accept it, he may bring a lawsuit to the people's court within three months from the date of receiving the notice. The decision made by the Patent Reexamination Board on the request for reexamination of utility model and design is final. If there is no objection to the patent application or the objection is not established after examination, the Patent Office shall make a decision to grant the patent right, issue a patent certificate, register and announce it. It can be seen that how long it takes to approve a patent application is influenced by many factors. Two years is fast, but it is uncertain whether it can be approved after two years.