This guide directs you to materials that will help search free patent sources
Charlotte Erdmann has served as a patent librarian fellow with the US Patent and Trademark Resource Center (formerly Depository Library Program) and has served as president of the related national association. Contact her here.
- U.S. Issued Patents and Published Applications
Are two separate databases and are searched separately. Issued patents are available from 1789-present and published applications are available since March 2001.
- TIFF viewer
Is necessary for viewing issued patents and published applications on the United States Patent and Trademark web site.
Searches databases that U.S. patent examiners use at the Patent Office. The system has flexibility and is available at the Engineering Library only. Contact Charlotte Erdmann for an appointment.
- 7 Step Search Strategy - (USPTO - PTRC)
Provides a brief one page guide to searching and reviewing patents. It is focused on USPTO databases
- Chemical Abstracts (SciFinder Scholar)
Is helpful for chemical U.S. and international patents as well as journal articles, conference papers, and book chapters. It is licensed for Purdue users only.
- Lexis-Nexis Patents
Permits full-text and fielded searching. It is licensed for Purdue users only.
- Patent Lens
Offers keyword and gene sequence searching for patents since 1976. Full-text is in PDF.