Nanoscale organic UV filters

US6368577B1 · kind B1 · utility

Assignee

• Cognis Deutschland GmbH · DE

Inventors

• Christian Kropf · Hilden, DE
• Hans Dolhaine · Mechernich, DE
• Thomas Foerster · Goldkronach, DE
• Bernd Fabry · Korschenbroich, DE

Key dates

• Filing date: Dec 8, 1999
• Grant date: Apr 9, 2002
• Expiry date: Dec 8, 2019

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/413
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A cosmetic or pharmaceutical composition used for blocking the penetration of ultraviolet radiation, the composition containing nanoscale organic UV filters having a mean diameter of from 10 to 300 nm.