12.01.16
US Patent No. 9,474,705 B2; ELC Management LLC has patented a method for whitening discrete hyperpigmented spots on skin by applying a liquid pigmented treatment composition that has at least one skin whitening active in a polymeric coating material comprising 1-35% dimethicone silylate; from 1-50% of a volatile solvent selected from the group consisting of isododecane, dimethicone and mixtures thereof; from 1-50% of a non-volatile silicone oil having a viscosity of 20 to 200,000 cst at room temperature; from about 0.1 to 40% of a silicone surfactant; from about 0.1 to 15% of a quaternized montmorillonite mineral; and from 0.5 to 65% titanium dioxide in combination with pigments that, upon exposure to ambient air and moisture in skin, hardens to a water resistant, water vapor permeable, conformable solid film that colors the spots so they are shade matched with the surrounding non-hyperpigmented skin and remains unchanged for 24 hours after application. It is designed to be applied to the spots every 12 to 72 hours.
