Patents Examined by D. Gbrielle Phelan
  • System for the controlled release of active agents and a process for its preparation
    Patent number: 5840335
    Abstract: A system for the controlled release of an active agent to an environment of use, said system having a predetermined release rate of the active agent to the environment of use, comprising: a) a shell comprised of a wall formed of a water-insoluble material which is permeable to the passage of an external fluid, and b) a core which is surrounded by said shell, said core comprised of i) a water-soluble active agent, and ii) a soluble polymeric adjuvant capable of unlimited swelling.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: November 24, 1998
    Assignee: Prof. Dr. Udo Wenzel
    Inventors: Udo Wenzel, Jurgen Metzner, Thomas Rosin, Halvor Jaeger, Zoser B. Salama