Patent ID: 7294610

Claim:
A composition comprising: (a) at least 10 parts per million of at least one surfactant of the formula: wherein: R f is a C 2 to C 6 perfluoroalkyl group; R is a C 2 -C 25 alkyl, hydroxyalkyl, alkylamine oxide, or aminoalkyl group which is optionally interrupted by a catenary oxygen, nitrogen, or sulfur atom; R 1 is an alkylene group of the formula —C n —H 2n (CHOH) o C m H 2m —, wherein n and m are independently 1 to 6, and o is 0 or 1, and where the alkylene is optionally interrupted by a catenary oxygen, nitrogen or sulfur atom; X − is SO 3 − or —CO 2 − ; and M + is a cation; (b) water; (c) oxidizing agent; and (d) an alkaline material.