The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2007
Filed:
May. 23, 2001
Mitchell S. Wortzman, Scottsdale, AZ (US);
Philip J. Gordon, Plano, TX (US);
Eugene H. Gans, Westport, CT (US);
Bhiku G. Patel, Chandler, AZ (US);
Mitchell S. Wortzman, Scottsdale, AZ (US);
Philip J. Gordon, Plano, TX (US);
Eugene H. Gans, Westport, CT (US);
Bhiku G. Patel, Chandler, AZ (US);
Medicis Pharmaceutical Corporation, Scottsdale, AZ (US);
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.