On the webpage of "China National Intellectual Property Administration Government Service Platform", click "Patent Affairs Service" and click any service items, such as notices and patent certificates.
In the pop-up service platform, click "Patent Examination Information Inquiry" to open the China and multinational patent examination information inquiry portal page.
Click the "China and multinational patent examination information inquiry" page, select the public inquiry box, and click Enter.
Enter the "Statement of Use" and click "Agree to the above statement". The "Continue" button on the right will change from gray to blue. Sometimes, due to system reasons, you may need to select "Agree to the above statement" several times before the "Continue" button will take effect.
Jump to the search page and enter the application number, patent name, applicant, etc. to search. Please note that it is not necessary to enter the penultimate decimal point of the application number.
For example, enter an application number at will, fill in the verification code, and click Query to display the retrieved items.
Click the application number/patent number in the search item to enter the patent information page. First, you can see the application information, including the legal status of the patent, including information describing the project, the applicant, inventor/designer, and information describing the change of the project (if any).