Patents by Inventor Dieter Hix

Dieter Hix 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).

  • Conversion of modification D to modification A of doxazosin mesylate
    Patent number: 6500830
    Abstract: A process for preparing doxazosin mesylate in modification A which comprises dissolving doxazosin with methanesulfonic acid in methanol or a mixture of an aprotic, polar organic solvent and methanol, removing any turbidity from the resulting solution, and stirring the resulting clear solution until no further precipitate separates out, removing, washing with methanol, heating the precipitate in the moist state in ethanol and, after cooling, isolating the resulting product is described.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: December 31, 2002
    Assignee: Knoll Aktiengesellschaft
    Inventors: Peter Klein, Marco Thyes, Dieter Hix
  • Medicaments containing doxazosin mesylate of crystalline modification D
    Patent number: 6476033
    Abstract: Drugs comprising modification D of doxazosin mesylate are described. They are suitable for treating high blood pressure.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: November 5, 2002
    Assignee: Chemische Fabrik Berg GmbH
    Inventors: Marco Thyes, Heinz Einig, Peter Klein, Dieter Hix