Chemical Abstracts Service Chemical Abstracts Service, a division of the American Chemical Society, is the premier provider of current information from the literature of chemistry. 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. They are developing Engineering Information Village, a large collection of engineering resources available by subscription over the Internet. Inc. OCLC produces the WorldCat international library catalog and provides access to many other databases through its FirstSearch and EPIC services. This web site contains numerous links to other Web information, especially on patents, trademarks and other intellectual property. UMI Formerly known as University Microfilms, UMI is the primary supplier of copies of dissertations from academic institutions worldwide.