Chemical Engineering Portals and General Resources
ChemAlliance
Laws & Regulation: United States Code Online, EPA summary of relevant laws, EPA Regulations (40 CFR), OSHA Regulations (29 CFR), DOT Hazardous Materials Transportation Regulations (49 CFR), Other Federal Regulations, EPA information on the rulemaking process, and new policy/regulatory changes.
NIST Chemistry WebBook: A Guide to the NIST Chemistry WebBook
By Peter J. Linstrom. The NIST Chemistry WebBook provides access to chemical and physical property data for chemical species through the internet. The data provided in the site are from collections maintained by the NIST Standard Reference Data Program and outside contributors.
United States Patent and Trademark Office (USPTO)
The home page of the USPTO provides links to all of their services including a database of all U.S. patents issued since 1790. This is the best site for obtaining information about patents in the United States.
Delphion Intellectual Property Network
A good source of patent information maintained by Delphion, this site will provide complete images of patents from 1971 to the present. There are many otherfeatures on this site, including foreign patent information, but they are fee-based as part of a subscription service.