1. Click on the "Charge Information Inquiry" column on the homepage of China National Intellectual Property Administration website, and then enter the application number (patent number) for inquiry. The disadvantage is that the website is slow to update.
2. Call the long-distance telephone office in China National Intellectual Property Administration. The disadvantage is that the line is busy.
The payer can inquire personal payment information by telephone. Enquiry telephone number: 010-62085566; 0 10-62088 166; 0 10-62088036; 0 10-6208804 1; 0 10-62088040; 0 10-62088042
3. Ask by email.
The application number, receipt number and remittance related information should be provided when inquiring.
The mailbox does not post the pinyin @ China National Intellectual Property Administration website of the toll office (three W's should be removed).