Light-stable cosmetic composition

US5718906A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Roland Martin · Hamburg, DE
• Ralf Emmert · Bayonne, US
• Thekla Kurz · Darmstadt, DE
• Gerd Bauer · Kleinostheim, DE
• Ulrich Heywang · Darmstadt, DE

Key dates

• Filing date: Mar 22, 1995
• Grant date: Feb 17, 1998
• Expiry date: Mar 22, 2015

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/52
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A light-stable cosmetic composition for protection from UV rays having a wavelength of between 280 and 400 nm, which contains at least one tetraalkylquercetin in a cosmetically acceptable oil-based medium, and new tetraalkylquercetins.