Patents by Inventor Hans-Werner Franz

Hans-Werner Franz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of bone cements comprising active compounds
    Patent number: 5797873
    Abstract: The invention relates to a process for the preparation of bone cements comprising active compounds and bone replacement materials or implantable drug depots produced therefrom. The bone cement is composed of a solid component and a liquid component. The active compound is dissolved in an organic solvent, the content of which does not exceed 50% by weight, based on the liquid component, and this solution is mixed with the liquid component or with the solid component.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: August 25, 1998
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Hans-Werner Franz, Berthold Nies