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Chinese-language Resources in STEM Fields

Provides information on finding Chinese-language resources in the science, technology, engineering and mathematics fields.

Google Patent Search

Google Patent Search

Patent Research Guide

Comparing patent resources



Created by

Availability timeline

Ease of use

Format available

Other features

Chinese Patent Database:

State Intellectual Property Office (China)

After publication. Updated weekly



Images. Browsed with Flash-based tool



European Patent Office (EPO)

3 - 4 months delay



Patent family search

Google Patents


Later than EPO, USPTO, and WIPO

Very easy


Handy translation and prior art search tools

Other patent resources

Several databases index Chinese patents:

This database is maintained by the State Intellectual Property Office (SIPO) of China. Patents are available online after publication and the database is updated weekly. Unfortunately, this database is difficult to use and doesn't have the full text of patents are not available in English. Patents also can't be downloaded as PDFs.

Derwent Innovations Index facilitates rapid, precise patent searching and merges the value-added patent information from Derwent World Patents Index with the patent citation information from Derwent Patent Citation Index.

Espacenet is freely available online and contains European, US, PCT, Japanese and other worldwide patents. Chinese patents are available 3-4 months after publication. This database is very easy to use and allows you to download PDFs of patents. It's also very easy to find similar patents using the patent family.   

Search by chemical structure or substructure, reaction, name, formula, etc., or by natural language query. Database use requires the creation of an individual user account for current U-M affiliates (follow this link to create an account). For general public walk-in use, contact the Chemistry Librarian.

Combined web access to Beilstein, Gmelin and Patent Chemistry Database.

Very easy to use. Covers worldwide patents but Chinese patents are available later than on Espacenet or the Chinese Patent Database (SIPO). Also doesn't provide comprehensive patent coverage.