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provided by FIZ Karlsruhe

New on STN

March 2020

STN Database Updates continue as usual

March 2020

European Patent Office warns about possible delays in data delivery due to the Corona Crisis

March 2020

First 2020 Update to Emtree Now Available on STN(R)

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Copyright Day 2020, 05.May, Frankfurt
PATINFO 2020, 17.-19.Jun, Ilmenau
The 2020 AI-SDV Conference,
05.-06.Oct, Nice

STN User Meetings

Munich, 20.05.2020

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Derwent World Patents Index® (DWPISM)
and Derwent Markush Resource (DWPIM)

The Derwent World Patents Index (files WPINDEX/ WPIDS/WPIX) is a comprehensive value-added database of worldwide patents covering all areas of technology. The intellectual value of DWPI is the result of a thorough editorial process of classification, abstracting, and indexing. Original titles and abstracts are rewritten to reveal the actual invention and highlight the main uses and advantages of the technology.


Content and coverage

The DWPISM database enables professionals to more easily research and  understand the world’s innovations through editorially curated, English-language abstracting and indexing of patent documents from 48 patent issuing authorities worldwide and two literary sources, including patent data from Asia-Pacific, Europe, the Middle East and North and South America. DWPI contains more than 23 million unique inventions (basic records/patent families) covering over  50 million patent documents and is used globally by thousands of organizations and 40 patent offices, making it the world’s most trusted and authoritative patent database. The file contains more than 23.1 million documents with more than 15.3 million images back to 1963 and is updated every 3-4 days.

DWPI’s reliable and enhanced patent data contains many key features that distinguish it as the most trusted source of patent research information available. Patent records contain descriptive titles, abstracts summarizing an invention’s novelty using industry terminology, and corrections to important bibliographic information, including misspelled assignee and inventor names, erroneous priority data, missing classification codes and more. An expertly trained staff of several hundred editors applies over 5,000 rules to normalize, standardize, correct and enhance patent records resulting in approximately 6,000 corrections each week.

DWPI also features unique coding and indexing systems that are intellectually and consistently applied across all patent authorities and technologies allowing for precise, relevant and accurate retrieval of information.  The intensive editorial process and quality checks result in authoritative and accurate patent data giving users insights that might otherwise be missed.

  • high-quality bibliographic information which summarizes all publication details for a particular invention
  • enhanced Derwent titles and patent-focused abstracts
  • DWPI-specific coding and deep indexing for chemical patents
  • full coverage of the International Patent Classification (IPC 8)
  • original patent titles, abstracts, and main claim text


The Derwent Markush Resource database (DWPIM) on STN

The inclusion of chemical Markush structures in patent searches is decisive for assessing the patentability of a substance or substance class. The Derwent Markush Resource database is fully integrated in the STN search environment for chemical (structure) databases with an easy to use modern interface. For the first time, patent information professionals are able to conduct all of their chemical structure and Markush searches on a single platform using the most important chemical structure databases including CAS Registry, MARPAT, Reaxysfile, Derwent Chemical Resource and Derwent Markush Resource. Other benefits of Derwent Markush Resource on STN include the possibility to combine structure and text terms and to apply sophisticated search parameters to perform reliable high precision searches. Various structure displays options allow for a significantly accelerated evaluation of search results.
The database is available on STNext.



Numeric Property Search Feature – exclusively on STN!

To add further value to this prestigious database on STN International, FIZ Karlsruhe has developed a unique new feature that allows for numeric property searching in the English text of all documents (enhanced title, abstracts, claims). That comprises

  • 55 physical and chemical properties
  • 1,800 spelling variants of units recognized
  • Automatic unit conversion: A search in Kelvin will also generate hits with respective values in degrees Celsius or Fahrenheit.
  • Proximity searching with numeric properties and keywords
  • Flexible data input (ranges, tolerances, exact values)


The Derwent Value-Add for Chemical Patents

DWPI Chemistry Resource (DCR) provides structure based access to specific chemical compounds back to 1999 for all users of DWPI. Subscribers can also benefit from

  • Fragmentation coding providing access to specific and Markush structures back to 1963
  • Polymer Indexing available for all polymer-related patents back to 1966
  • Manual Codes used in the chemical, pharmaceutical and agrochemical area to classify significant parts of the invention and its commercial application, back to 1963.

The Derwent Value-Add for Engineering Patents

Manual Codes are used for engineering patents to classify the novel technical aspects of an invention as well as its commercial application, back to 1980.


Your Benefit

  • more comprehensive retrieval and easier relevance checking from value-added text data
  • more reliable technology searching with DWPI deep indexing
  • great variety of search options for more focused searches
  • efficient patent analysis from highly standardized bibliographic data


Information and Training Material

DWPI Reference Manual (07/2012)
DWPI with New Numeric Property Search Feature (Brochure)
Numeric property searching in DWPI on STN (e-Seminar, 04/2012)
Sample record 
User Documentation
Patents covered in current updates
Derwent World Patents Index in STN AnaVist