Do Patents and Trademarks Expire?
A U.S. utility patent is generally granted for 20 years from the date the patent application is filed. However, periodic fees are required to maintain the enforceability of the patent. A design patent is generally granted protection for 14 years measured from the date the design patent is granted.
A U.S. trademark generally lasts as long as the trademark is used in commerce and defended against infringement.
