05.01.18
US Patent No. 9,554,976 B2; The Procter & Gamble Company has been awarded a patent for its tooth whitening strip that is comprised of a backing layer; a tooth whitening composition comprising a mixture of first and second polymers, water, and a tooth whitening agent, wherein said first polymer is polyethylene oxide and said second polymer is polyvinyl alcohol; a fibrous web, scrim or mesh comprising fibers arranged to provide void spaces and where the web scrim or mesh has a coating or layer of the whitening composition.