CAS STNext® – the Choice of Patent Experts

CAS STNext® is the premier single source for searching the world's disclosed scientific and technical research. Providing integrated access to the most current and complete collection of global disclosed patent and non-patent, scientific and technical content, CAS STNext® supports comprehensive retrieval to inform critical business decisions. CAS STNext® puts instant access to over more than 100 diverse data collections at your fingertips, including leading chemistry content from CAS and patent content from Clarivate's Derwent World Patents Index.


The November 5, 2022 reload of EPFULL on STNext provides a variety of exciting new searching capabilities, particularly in the area of Independent Claims, where two new search and display fields have been introduced
The November 5, 2022 reload of PCTFULL features additional kind code coverage, new search and display fields for independent claims, patent assignee searching improvements and more.
The PS database is now current, with over 2800 records covering marketed active pharmaceutical ingredients launched from 1957 to date, as well as preparation methods for pharmaceutical substances.
Get direct access to the latest information from numerous patent authorities by using the new "Register Links" feature on CAS STNext. The register links appear online in CAS STNext displays in the well-known patent number drop-down menu of publication and