Patents by Inventor Klaus Fuhrmann

Klaus Fuhrmann 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 hydrogenation of coal
    Patent number: 4944866
    Abstract: A process for the hydrogenation of coal which entails slurrying pulverized coal with oil, hydrogenating the mixture at an elevated temperature and pressure and separating the liquid and solid reaction products from the gaseous reaction products, wherein the slurry oil contains non-process derived hydrocarbon mixtures having a boiling range above about 200.degree. C., in the amount of about 30-100% by weight with the remainder of the slurry oil being process derived oils having a boiling range above about 200.degree. C.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: July 31, 1990
    Assignee: Veba Oel Technologie GmbH
    Inventors: Klaus Fuhrmann, Ulrich Graeser, Ludwig Merz
  • Low temperature carbonization process for coal hydrogenation residues
    Patent number: 4584060
    Abstract: A method for low temperature carbonization of coal hydrogenation residues, wherein a coal hydrogenation residue is subjected to a reduced pressure distillation in a one-shaft or multishaft screw extruder, liberated gases and vapors are drawn off, and non-volatilized remaining material is subjected to low temperature carbonization in a screw extruder.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: April 22, 1986
    Assignee: Veba Oel Entwicklungs-Gesellschaft mbH
    Inventors: Lothar Winckler, Klaus Fuhrmann, Ulrich Graeser, Peter Wenning
  • Method of producing synthesis gas
    Patent number: 4583995
    Abstract: A method of producing synthesis gas from coal hydrogenation residues, wherein a coal hydrogenation residue is subjected to a reduced pressure distillation in a one-shaft or multishaft worm apparatus where the gases and vapors evolved are withdrawn and the unvolatilized remaining material is re-pressurized and is then introduced into a gasification reaction.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: April 22, 1986
    Assignee: Veba Oel Entwicklungs-Gesellschaft mbH.
    Inventors: Lothar Winckler, Klaus Fuhrmann, Ulrich Graeser, Peter Wenning