Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Wearing apparel – fabric – or cloth
Reexamination Certificate
2006-02-14
2006-02-14
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Wearing apparel, fabric, or cloth
Reexamination Certificate
active
06998130
ABSTRACT:
The present invention addresses the problem of excessive discoloration in hydroquinone compositions of a neutral pH. Antioxidants in the hydroquinone phase and inorganic or amino acyl cationic salts of acidic ascorbyl esters, preferably sodium metabisulfite and magnesium ascorbyl phosphate respectively, are effective in stabilizing such hydroquinone compositions, which are used in treatment of pigmentation disorders. Protected retinoid may be added to these compositions for additional skin benefit effects.
REFERENCES:
patent: 5559149 (1996-09-01), Clum et al.
patent: 5932612 (1999-08-01), Gordon et al.
Gans Eugene H.
Gordon Philip J.
Patel Bhiku G.
Wortzman Mitchell S.
Feehery Maryellen
Howard Sharon
McNichol, Jr. William J.
Medicis Pharmaceutical Corporation
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