10.01.18
US Patent No. 10,052,270 B2; Colgate-Palmolive Company, New York, NY, has patented an oral care composition that contains a peroxide whitening agent comprising a whitening complex of crosslinked polyvinylpyrrolidone complexed with hydrogen peroxide; sodium acid pyrophosphate; water; at least one humectant comprised of propylene glycol and glycerin; and tetrasodium pyrophosphate as a tartar control agent.