STN®—The choice of
patent experts

STN® gives you access to key scientific and intellectual property resources, including essential value-added chemistry content from CAS and patent content from Derwent World Patents Index®. The comprehensive content collection, unparalleled search power and proven reliability of STN reduce your risk of missing critical information and help you protect valuable intellectual property.

STN focuses on meeting your needs and is relied upon by patent experts worldwide.

  • 94% of the world’s patent applications are reviewed by
    patent offices that choose STN
  • 7 of the world's top 10 issued IP law firms choose STN
  • The world's top 25 pharmaceutical companies choose STN

STN provides you with an information advantage, empowering you to answer business critical questions with insightful analysis that fuels informed decision making throughout your organization.


Maximize efficiency and synergy with STN by accessing the world’s scientific information on one integrated platform:

  • The complete CAS collection of authoritative chemistry information
  • Value-added patent content, including CAplusSM, Derwent World Patents Index and INPADOC
  • Global full-text patent collection, including extensive Asian coverage
  • Key biomedical databases to support research, pharmacovigilance and IP searching
  • Unique content from journals, conferences and dissertations covering everything from petroleum to polymers and food science to physics


The robust search features of STN give you the flexibility to search as broadly or as narrowly as you like and address the unique challenges of searching and analyzing sci-tech, chemical and patent information:

  • Locate keywords and numeric values in text
  • Search by chemical structure
  • Use subject-specific thesauri
  • Visualize and analyze information


STN goes beyond content and tools. As your partner, we care about the quality of your search results and are ready to help when you need us.

  • Knowledgeable and dependable global STN representatives provide quality service, support and training
  • With STN, your search is always 100% confidential
  • STN system reliability consistently exceeds 99%

New STN transforms the professional IP search experience

New STN addresses the needs and priorities of today's IP professionals with a state-of-the-art search and analysis solution. Integrating cutting-edge technology with a wide range of content and features in an intuitive interface, new STN offers enhanced search power, speed and unique capabilities.

New STN is available exclusively to customers with fixed fee, Global Value Pricing and Search Service Value Pricing agreements.

For more information

For more information about STN, please visit or
STN is operated jointly by CAS and FIZ Karlsruhe worldwide and represented in Japan by JAICI.