How long it takes to withdraw a patent application is generally determined according to the examination time of the patent office, and there is no specific mandatory provision in the law. The applicant needs to submit a written withdrawal application before being granted the patent right by the Patent Office, indicating the application number, application date and other information.
Legal objectivity:
patent law of the people's republic of china
Article 32
The applicant may withdraw his patent application at any time before being granted the patent right.
Detailed Rules for the Implementation of People's Republic of China (PRC) Patent Law
Article 36
Where the applicant withdraws his patent application, he shall file a declaration with the patent administration department of the State Council, stating the name of the invention-creation, the application number and the application date.
The declaration of withdrawing the patent application was made after the patent administrative department of the State Council made preparations for publishing the patent application documents, which should still be published;
However, the statement of withdrawing the patent application shall be announced in the patent bulletin published later.