Training Center

To search for words containing your search term, please add an asterisk '*' BEFORE or BEHIND your search term. Example: *connect* finds 'Reconnection'.

Please visit the CAS STNext® Training Center operated by CAS, which also offers a full range of CAS STNext® resources and webinars.

Quick Reference Cards

  • Quick Reference Cards

    CAS Roles in CA/CAplus

    CAS roles are powerful CAS indexing terms that allow you to search for precise information on substances. Roles are assigned to every indexed substance and to controlled index terms for classes of compounds.
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    ANALYZE and TABULATE for statistical analysis

    With ANALYZE, you can easily extract up to 50,000 terms from an answer set for statistical analysis. Use the DISPLAY command to view your analyzed terms as a one-dimensional list.
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    CA section thesaurus

    Use the CA section thesaurus in CA/CAplus on STN to quickly find information on how any of the CA sections may have changed from 1907 to the present.
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    FSEARCH for finding patent families

    Use FSEARCH (Family SEARCH) to search for additional family records for patents, including equivalents and related patents such as continuations-in-part or divisions.
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    Patent search fields

    You can use standardized search field codes and formats in searching patent databases on STN.
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    Citation searching in SciSearch

    You can use citation searching in SciSearch in two ways:
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    Thesauri on STN

    Online thesauri are available in many databases on STN.
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    CASLink for one-step structure searching in CAS REGISTRY, MARPAT, and CAplus

    Use the CASLINK database cluster for quick, easy, and cost-effective substance searching in REGISTRY, MARPAT, and CAplus.
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    Basic STN Commands

    These command tables identify both STN command languages: the NOVICE and EXPERT versions of the command.
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    Cited patent searching

    Cited patent numbers are searched in the Referenced Patent Number (/RPN) field.
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    CPC Search and Display

    The Cooperative Patent Classification System (CPC) was developed by the EPO and the USPTO as a common, internationally compatible classification system for patent publications, which will be used by various offices in the patent granting process.
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    DUPLICATE for identifying or removing duplicate records

    Use the DUPLICATE command to identify or remove duplicate answers. DUPLICATE may be used with L-numbers created in single or multiple databases.
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    INDEX for evaluating databases and searches

    The INDEX command is a cost-effective way to determine which STN databases contain the information you need.
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    Archive and redistribute results with the STN Information Keep and Share Program

    You may easily purchase the right to keep (archive) and share (redistribute) search results from STN databases in excess of their data use policies.
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    Transfer for crossfile searching

    TRANSFER automatically extracts up to 50,000 terms from an L-number answer set and searches extracted data in one or more target databases.
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    7 Ways to Revitalize Your Search Experience with STNext

    Learn about the benefits STNext brings to your search workflow.
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    FSORT for grouping patent records into families

    Use FSORT (Family SORT) to group patent records from L-number answer sets into patent families.
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    CAS Registry Motif Sequence Searching

    This card summarizes STN motif symbols and characters as well as types of motif searches on STN.
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