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.


Exclusively for the benefit of STN customers, the PPAK field now includes "Claim" tags for substances appearing in the Claims, and the PatentPak Interactive Viewer has been updated to support this enhancement.
Previously available only for CAS Registry(R) and CAplus(R), this valuable option is now also available for Derwent Chemistry Resource(R) (DCR) and the Derwent World Patents Index(R) (WPINDEX/WPIDS/WPIX).
Derwent World Patents Index (DWPI) now features a tremendous increase in the availability of Claims content, providing the opportunity for more comprehensive prior art searching.
Additional authorities will be announced on a quarterly basis.