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Patent Full-Text Databases
Start here for patent searching. The U.S. Patent and Trademark Office (PTO) Web Patent Full-Text Databases include the full text of all patents granted since 1976, and the patent number, issue date, and current US classification for all patents granted from 1790 through 1975. It also provides TIFF images of most of them.
Locate the important chemistry in a patent by using CAS scientists' direct links to key substances in the source patent.