Is there a time limit for withdrawing a patent application? What procedures are required?

There is no time limit for withdrawing a patent application, and the application can be withdrawn before the patent right is granted.

Submit a statement of withdrawal of the patent application, and attach it with evidence proving that all applicants have signed or stamped their consent to withdraw the patent application, or only submit a statement of withdrawal of the patent application signed or stamped by all applicants.

If a patent agency is entrusted, the procedure for withdrawing the patent application shall be handled by the patent agency, and shall be accompanied by supporting materials indicating that all applicants have signed or stamped their consent to withdraw the patent application, or only the patent agency shall submit A statement of withdrawal of the patent application signed or stamped by all applicants.