US Patent No. 8,535,652 B2; L’Oréal, Paris, has patented a soap-free, self-foaming gel packaged in an aerosol container with a piston or flexible pocket separator to separate the gel from propellant necessary for ejecting the gel. The gel comprises, in a cosmetically acceptable medium, at least one aqueous phase; at least one N-acylsarcosine where the acyl radical is a C10-C20 radical; at least one mineral or organic base in an amount sufficient to dissolve the N-acylsarcosine and produce a pH o...