Legal Analysis: Eighteen months. After the patent administration department of the State Council receives an invention patent application, and upon preliminary examination determines that it meets the requirements of the Patent Law of the People's Republic of China, it will be published immediately after eighteen months from the date of application. The patent administration department of the State Council may publish the application as early as possible upon the applicant's request.
Legal basis: "Patent Law of the People's Republic of China" Article 34 After the patent administration department of the State Council receives an application for an invention patent, if it is determined upon preliminary examination that it meets the requirements of this law, the patent application shall be valid from the date of application. It will be announced immediately after eighteen months. The patent administration department of the State Council may publish the application as early as possible upon the applicant's request.