Users may conduct fielded and boolean searches or search by patent number. The full-text returns include the Summary, Claims, Description, and References. Drawings and images are not available online. Search tips and help are provided at the site. This site also includes a lot of information about patenting.
Coverage varies by country.
Bibliographic data of all patents published in the preceding two years is available. The abstract, first page drawing, other drawings and fulltext may be displayed and printed, when available. There does not appear to be any costs associated for use of this service nor is registration required. A CAS account User ID and password are required , but all searching, registration and display of patent titles and abstracts is free . Registration requires credit card or purchase order information.