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.

CAS STNext® News on STN

Records with updated indexing are now available in the file.
Claim tags are now available back to 1984 for US patents, and will be extended back to 1975 in the weeks to come.
Emtree is a critical resource for the most updated terminology in biomedicine, pharmacology and medical devices, and is updated three times per year.
Use MeSH to find the most up-to-date biomedical terminology for inclusion in your searches.