11.14.05
Patent No. US 6,576,228 B1: Unilever Home & Personal Care USA, Green-wich, CT, patented a personal wash bar composition comprising an anionic surfactant, another surfactant, a free fatty acid, a water-soluble structurant and a sunscreen and/or salt with SPF between 2-25. The lather generated by the composition degrades no more than 50% after 30 minutes as measured in 100 ml graduated cylinders which have been shaken for 10 seconds.