How long does it usually take to apply for patent license?

Legal analysis: The patent licensing contract concluded between the patentee and others shall be filed with the Patent Office within 3 months from the date when the contract comes into effect. Compulsory license: the patentee fails to implement or not fully implement the patent for three years from the date of granting the patent right and four years from the date of filing the patent application without justifiable reasons.

Legal basis: Article 48 of the Patent Law of People's Republic of China (PRC) is under any of the following circumstances, and the the State Council Patent Administration Department may grant a compulsory license to exploit the invention patent or utility model patent upon the application of a unit or individual with implementation conditions: (1) The patentee fails to exploit or fully exploit his patent for three years from the date of patent grant, and for four years from the date of patent application without justifiable reasons; (2) The patentee's act of exercising the patent right is recognized as a monopolistic act according to law, so as to eliminate or reduce the adverse effects of the act on competition.