As a general rule, for works created after January 1, 1978, copyright protection lasts for the life of the author plus an additional 70 years. For works “made for hire,” e.g. by an employee for her employer, the copyright endures 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. Therefore, copyright rights may last many years beyond the term of patent rights if your innovation includes available copyright and patent protection. For more detailed information on copyrights, see http://www.copyright.gov/help/faq/.