1 Visit to official website: www.sipo.gov.cn.
In the "Patent Search" column in the lower right corner, enter the patent number.
If there is no patent number, select "Advanced Search" and write down the name of the patent you want to inquire in the "Name" column. Just click search.
Note: this patent is not available, but it may have been terminated, that is, this patent is no longer protected by the state. You also need to check the legal status of this patent.
Inquiry method of legal status:
1 Visit to official website: www.sipo.gov.cn.
Click on the legal status inquiry at the lower right of the webpage, and enter the patent number in the opened webpage for inquiry.
This patent may not be published, that is, information about this patent may not be found.