I have a secret recipe from my family now. How should I apply for a patent? Where in the local department?

According to the Patent Law, the examination and approval procedure of an application for a patent for invention includes five stages: acceptance, preliminary examination, publication, actual examination and authorization. The application for a patent for utility model or design does not undergo early publication and substantive examination in the examination and approval, and there are only three stages: acceptance, preliminary examination and authorization. To get a patent, you can apply directly to the patent office. In view of the complexity of applying for a patent, you usually apply to a patent agency. The agency will help you write all the documents such as patent right, and then submit them to the patent office to help you track your application. It takes two and a half to three years for an invention to get a certificate. The individual application fee is 4500. The flow chart of patent application and examination for invention, utility model and design is as follows: