Legal analysis: The examination time for invention patents is eighteen months from the date of application.
legal basis: article 34 of the patent law of the people's Republic of China. after receiving an application for a patent for invention, the administrative department for patent in the State Council, after preliminary examination, finds that it meets the requirements of this law, and it will be published after 18 months from the date of application. The patent administration department of the State Council may publish its application at an early date upon the request of the applicant.