What is the process, cost and time of applying for an invention patent?

Process of application for patent for invention: pre-application service process ① consultation and negotiation → ② signing contract → ③ preparing technical materials → ④ writing application documents → ⑧ customer review and confirmation →⑧submitting application →⑧receiving acceptance notice →⑧substantive examination agency process ① customer entrustment → ② making power of attorney → ③ submitting actual examination request and related materials → ④ receiving examination notice → ⑧ responding to actual examination opinions →⑧obtaining invention patent certificate. Book patent application, examination process and time application-acceptance-preliminary examination-publication-substantive examination-authorization-licensing application An application for a patent for invention includes two stages, one is preliminary examination, and the other is actual examination. After submission to the Patent Office, there will be an acceptance notice with the patent number on it, which will enter the preliminary examination stage after submission. After preliminary examination about six months from the date of filing, the patent will be held. The practicality, novelty and creativity of the joint trial patent actually tried, if there is any problem in the middle, it is uncertain for several times, and the speed of reply is also uncertain, so whether it can be authorized in the end and the time is also uncertain. If all goes well, it can be authorized in one and a half years at the earliest, that is, there is a certificate. The application fee for invention patent generally consists of China National Intellectual Property Administration fee and agency fee, mainly depending on the agency fee you choose.