Water-in-oil-in-water compositions

US5656280A · kind A · utility

Assignee

• Helene Curtis, Inc. · US

Inventors

• Craig A. Herb · Chicago, US
• Liang Chen · Lombard, US
• Judy B. Chung · Glenview, US
• Michelle A. Long · Lombard, US
• Wei-Mei Sun · Palatine, US
• Gerald Newell · Hoffman Estates, US
• Trefor A. Evans · Lombard, US
• Kimberly Kamis · Glenview, US
• Richard M. Brucks · Chicago, US

Key dates

• Filing date: Dec 6, 1994
• Grant date: Aug 12, 1997
• Expiry date: Dec 6, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01F23/4144
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Water-in-oil-in-water multiple emulsion compositions are disclosed. The multiple emulsion compositions comprise an external aqueous phase optionally incorporating a surfactant system capable of forming liquid crystals as an emulsifier. The internal phase comprises a primary water-in-oil emulsion, wherein the primary emulsion comprises a first topically-active compound, a surfactant phase, an oil phase, and water.