Resources

United States Patent and Trademark Office (USPTO)

http://www.uspto.gov/

Patent learning center:
http://www.uspto.gov/patent

Fee schedule:
http://www.uspto.gov/learning-and-resources/fees-and-payment/uspto-fee-schedule

Patent Application Information Retrieval (PAIR):
Public: http://portal.uspto.gov/pair/PublicPair
Private: https://ppair.uspto.gov/TruePassSample/AuthenticateUserLocalEPF.html

Patent Electronic Filing System (EFS-Web):
Unregistered: https://efs.uspto.gov/EFSWebUIUnregistered/EFSWebUnregistered
Registered: https://efs.uspto.gov/TruePassSample/AuthenticateUserLocalEPF.html

USPTO subscription request:
http://enews.uspto.gov/lists/?p=subscribe&id=1