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Otras bases de datos:
Para acceder a otras áreas de Quimifarma, consulte Selección de contenidos.
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PATENTES
Bases de datos de libre acceso
- IBM patent server
Allows you to search, retrieve and study 26 years of U.S. Patent & Trademark Office (USPTO) patent descriptions as well as the last seventeen years of images (over two million patents). A variety of convenient search interfaces (patent number search, Boolean text search, Advanced text search, ) are available together with an on-line patent ordering form.
- QPAT-US (Questel-Orbit)
Front pages of U.S. patents issued since 1974 (registration required). The full text subscription is accessible to paying subscribers only.
- United States Patent and Trademark Office (USPTO)
Searchable (Boolean, advanced and patent number)database of patent front-page information (e.g. title, abstracts, company, inventors names, patent number, etc.). Allows you to browse the U.S. Patent Classifications Database.
Bases de datos comerciales de patentes
- Chemical Patents Plus (CAS)
Searching of fulltext U.S. patent documents from 1971 on patent number, basic text, CAS Registry Number, CAS chemical indexing, inventor or assignee name, or in any of a variety of other specific patent data fields or combinations. (Free demo)
- CNIDR U.S. Patent Bibliographic Database Search Site
Contains WWW-interfaces (boolean search page, advanced command-line search page)for patent seraching and provides browsing of the U.S. Patent classifications database.
- Derwent Patents Citation Index (Derwent Information, Ltd.)
Contains every citation appearing in patents from 16 patent-issuing authorities, from mid 1994.
- Derwent World Patent Index (Derwent Information, Ltd.)
The most comprehensive database of inventions published worldwide. It covers over 7 million separate inventions from more than 13 million patent documents.
- Patent Information in the WPINDEX File on STN
- Patentweb
- QPAT-US (Questel-Orbit)
Full text searching of all America patents issued since 1974. Free demo containing over 6000 patents.
- Shadow Patent Office
- STO's Internet Patent Search System
Patent searches and information on the patenting process.
- The U.S. Patent Citation Database
Search the entire U.S. Patent Citation Database, newly Issued U.S. Patents or U.S. Patents by Classification
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