Patent No. US 6,737,069 B1: Japanese researchers for National Starch and Chemical Investment Holding Corp., New Castle, DE, patented a cosmetic composition containing an amphoteric urethane resin having at least one carboxyl group and at least one tertiary amino group in a molecule, as well as a silicone polymer.
Cosmetic Patent Earned By National Starch
Published November 15, 2005
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