Patents by Inventor Karlheinz Heidenbluth

Karlheinz Heidenbluth 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 isolation of ergot alkaloids from culture suspensions
    Patent number: 4237291
    Abstract: A process for isolating ergot alkaloids from culture suspensions, in which after mechanical filtration, the residue is dried in a fluidized drying bed and the alkaloids are extracted with an aprotic organic solvent, reextracted with a weakly acidic aqueous solution which is subsequently made basic, and finally extracted with a water-immiscible organic solvent, from which the alkaloids are isolated in a conventional manner. In certain instances, the culture suspension is stirred with an adsorbent clay to entrain the water-soluble alkaloids.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: December 2, 1980
    Assignee: VEB Arzneimittelwerk Dresden
    Inventors: Werner Grawert, Ludwig Schiedt, Brigitte Neumann, Karlheinz Heidenbluth, Christoph Dauth, Rudolf Schirutschke, Monika Muller