1. Submit the invalidation request file by mail. The mailing address is: Re-examination and invalidation office of China National Intellectual Property Administration Patent Office, No.6, Xitucheng Road, Jimenqiao, Haidian District, Beijing, zip code 100088.
2. Submit a request for invalidation to the Patent Office's acceptance window. Address: invalid business window for reexamination in the reception hall of China National Intellectual Property Administration Patent Office, No.6, Xitucheng Road, Jimenqiao, Haidian District, Beijing.
3. Submit the registered China patent electronic application user electronically, log in to "China Patent Electronic Application Network" to download the electronic application client, and submit the request document for invalidation by using the re-examination electronic request module.