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The Chinese Patent Office (SIPO) has launched its "China Patent Inquiry System" (CPQUERY) which gives the public online access to file wrapper information for Chinese patent, utility model and design applications. The system covers information for applications filed after 10 February 2010 and is updated on a weekly basis.
Users can retrieve bibliographic data, application information, corrections/amendments, office actions, decisions (grant, refusal, withdrawal) and other documents contained in the file. Post-grant information is not included. The individual documents are available in PDF format and can be printed for reference purposes.
The source is available in Chinese only, however, retrieving the information with a number search is possible without knowledge of the language. A step-by-step search guide on how to proceed is available on the EPO's "virtual helpdesk" on Asian patent information.