PubChem is an open chemistry database at the National Institutes of Health and a good source for patent searching, and includes information on chemical structures, identifiers, chemical and physical properties, biological activities, health, safety, toxicity data, and more.
Patent classification is a system for organizing all U.S. patent documents and other technical documents into specific technology groupings based on common subject matter, including chemistry. On January 1, 2013, the USPTO moved from using the United States Patent Classification (USPC) system to the Cooperative Patent Classification (CPC) system, a jointly developed system with the European Patent Office (EPO). CPC has now been adopted by many countries throughout the world.
UML's library guide to searching patents. Patents can play an important role in chemical research. Visit our guide for tips on how to search for patents, featured databases with patent information, and links to U.S. and international patent offices.