Patents Examined by Robert Joynes
  • Microparticle preparations made of biodegradable copolymers
    Patent number: 6383470
    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.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: May 7, 2002
    Inventors: Thomas Fritzsch, Dieter Heldmann, Werner Weitschies