Chemical Information System Chemical Information Service, a service of the Oxford Molecular Group, provides access to over thirry databases with chemical information, especially environmental data. This site gives a list of the databases available on CIS, and contact information. Inc. Derwent is the world's leading producer of patent information databases, including the Derwent World Patents Index, and a number of specialty databases. This site includes some brief descriptions of the nature of patents and the patenting process. Derwent also maintains the Patent Explorer site, a Web-based tool for searching and displaying U.S. and European Patent Office patents.
Membership is required, and there are fees for displaying patents, but membership is free for now.
The site above is the new home site for Dialog, and some of the information at the Web site is still in transition from the old web site, but there are links to the older site where necessary. Fachinformationszentrum Chemie FIZ Chemie is the producer of the Cheminform chemical reactions database, among others. The site includes demos of some of their databases. Inc. OCLC produces the WorldCat international library catalog and provides access to many other databases through its FirstSearch and EPIC services. Prous Science Publishers Prous Science is a leading publisher of information on pharmaceuticals and medicinal chemistry.