This composition is aimed notably to give to skin a smoother and softer appearance,...http://www.google.com/patents/US5609873?utm_source=gb-gplus-sharePatent US5609873 - Treatment of psoriasis and other skin disorders associated with keratinocyte differentiationAdvanced Patent SearchPublication numberUS5609873 APublication typeGrantApplication numberUS 08/393,009Publication dateMar 11, 1997Filing