U.S. Patent No. 7,445,769 B2 Cadbury Adams USA LLC, Parsippany, NJ, has patented a stain-removing chewing gum. It is comprised of the gum base, a chelating agent and a surfactant. The surfactant is comprised of a stain-removing effective amount of a salt of ricinoleic acid and a nonionic surfactant or an additional anionic surfactant wherein the salt of ricinoleic acid has a lower affinity for the gum base than a salt of stearic acid....