Cosmetic formulation comprising dihydroxyacetone

Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations

Reexamination Certificate

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Details

C424S060000, C424S400000, C424S401000

Reexamination Certificate

active

10485389

ABSTRACT:
The invention relates to cosmetic formulations containing dihydroxy-acetone and a topical support in addition to one or several compounds selected from the compounds of formulae (Ia) and (Ib), the physiologically acceptable salts of compounds of formulae (Ia) and (Ib), and the stereoisomeric forms of formulae (Ia) and (Ib), wherein R1, R2, R3, R4and n have the meanings cited in Claim1. The cosmetic formulations are characterized in that the UV-A protective effect of dihydroxyacetone is increased.

REFERENCES:
patent: 5705145 (1998-01-01), Miklean et al.
patent: 195 05 154 (1996-08-01), None
patent: 199 33 466 (2000-01-01), None
patent: 198 34 816 (2000-02-01), None
patent: 2 779 958 (1999-12-01), None
patent: 94 23693 (1994-10-01), None
M. Eisvogel, “Sun Protection with Anti-Ageing Merck Puts Ectoin to Work”,Cossma: Cosmetics, Spray Technology, Marketing, Braun Fachverlage, Karlsruhe, DE, Bd. 2, Nr. 4 (Apr. 2001).

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