Patents for Humanity Program Improvement Act of 2013 - Allows the holder or successor of an acceleration certificate issued pursuant to the Patents for Humanity Program (a pilot awards program established by the U.S. Patent and Trademark Office [USPTO] entitling awardees to accelerate certain USPTO proceedings for patented technologies addressing humanitarian needs among an impoverished population or for further research on humanitarian technologies) to transfer, including by sale, the entitlement to such certificate to another person.