Patent ID: 6974871

Claim:
A composition for protecting human skin from harmful effects of the sun, the composition comprising a topically effective amount of: (a) a first chemical compound that absorbs ultraviolet light sufficiently to reduce significantly the damage to human skin from harmful effects of ultraviolet light; and (b) a second chemical compound having the formula: (Q-T) u + X −v wherein: Q represents 4-E-2-R 3 -1-quinolinium; E represents NR 1 R 2 , COO R 1 , OR 1 , I, Br, Cl, F, or NO 3 N represents a nitrogen atom; R 1 and R 2 independently represent hydrogen or lower alkyl; R 3 represents E, hydrogen or lower alkyl; T represents hydrogen or a chain comprising m atoms, the atoms in the chain being t carbon atoms and 0 to approximately 0.5t heteroatoms; the minimum value of m is 6; the maximum value of m is 22; X represents an anion; and u and v represent 1, 2, or 3 with the proviso that u=v.