Patents

Composition with Gluthathione Precursor Comprised of 4-Substituted Resorcinols and Amino Acids

Conopco/Unilever is awarded a patent for this water-in-oil emulsion.

US Patent No. 11,596,586 B2 (Marian Pereira Guelakis, Jianming Lee, Jose Guillermo Rosa, Stephen Alan Madison, Tingyan Ml, Sanita Damodaran, Annu Kumari, Nan Huang and Bijan Harichian); Conopco, Inc., Englewood Cliffs, NJ (dba Unilever), has been awarded a patent for a personal care composition that is a water-in-oil emulsion. It contains glutathione precursor comprising cystine, glycine (optionally), pyroglutamic acid or a salt or ester thereof, and resorcinol selected from 4-hexylresorcinol, 4-ethylresorcinol, and 4-isopropylresorcinol; a retinoid; and a cosmetically acceptable carrier. The pH of the composition is in the range of 3.5-8.5. The water-in-oil emulsion contains cystine in an aqueous phase. The patent notes that 90% of water droplets have a diameter within the size range of 100 nm to 20 microns.

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