Microparticle preparations made of biodegradable copolymers

US6383470B1 · kind B1 · utility

Inventors

• Thomas Fritzsch · Berlin, DE
• Dieter Heldmann · Munich, DE
• Werner Weitschies · Neuenkirchen, DE

Key dates

• Filing date: Jul 21, 1997
• Grant date: May 7, 2002
• Expiry date: Sep 23, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K49/223
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to microparticle preparations made of biodegradable copolymers for use in treatment and diagnosis, especially ultrasonic diagnosis, as well as a process for their production.