Legal analysis: Examination time of invention patent application: The whole process of invention patent from application to authorization is completed in the examination. According to the provisions of the Patent Law, after receiving an application for a patent for invention, the patent administrative department in the State Council has to go through a series of examination and approval procedures, such as preliminary examination, substantive examination, authorization and announcement. The time required to complete these procedures depends on the progress of each link, and there is no exact regulation. Generally, it is 6- 18 months.
Legal basis: Article 35 of the Patent Law of People's Republic of China (PRC). Within three years from the date of filing, the administrative department for patent in the State Council may, upon the request of the applicant at any time, make a substantive examination of the application. If the applicant fails to request substantive examination within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn.
The patent administrative department of the State Council may, when it deems it necessary, examine the application for a patent for invention on its own.