How long does patent, trademark or copyright protection last?

U.S. utility patent is granted for 20 years from the date the patent application is filed; however, periodic fees are required to maintain the enforceability of the patent. U.S. trademarks can last forever, as long as the trademark is used in commerce and defended against infringement. Copyright protection is for a limited term. For works created after January 1, 1978, copyrights last for 70 years after the death of their owner. For works made for hire (covering the usual type of work owned by a small business), the copyright lasts for a term of 95 years from the year of its first publication or a term of 120 years from the year of its creation, whichever expires first.  more

A U.S. utility patent is granted for 20 years from the date the patent application is filed; however, periodic fees are required to maintain the enforceability of the patent. U.S. trademarks can last forever, as long as the trademark is used in commerce and defended against infringement. Copyright protection is for a limited term. For works created after January 1, 1978, copyrights last for 70 years after the death of their owner. For works made for hire (covering the usual type of work owned by a small business), the copyright lasts for a term of 95 years from the year of its first publication or a term of 120 years from the year of its creation, whichever expires first.  more