Patents by Inventor Eckhard Häffner

Eckhard Häffner 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).

  • Method for high pressure polymerization of ethylene in the presence of supercritical water
    Patent number: 6849698
    Abstract: In a process for polymerizing ethylene and, if desired, further monomers in a high-pressure reactor at from 140 to 320° C. and pressures of from 1000 to 4000 bar, but in any case under pressure and temperature conditions under which water displays supercritical behavior, water is introduced continuously or intermittently into the reactor.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: February 1, 2005
    Assignee: Basell Polyolefine GmbH
    Inventors: Eckhard Häffner, Dieter Littmann, Frank-Olaf Mähling, Gernot Köhler
  • Process for the continuous extraction of mixtures of organic substances with supercritical solvents
    Patent number: 5011594
    Abstract: A process for the continuous extraction of mixtures of organic substances including high boiling point constituents and/or constituents which do not boil but which melt with at least one solvent in the supercritical state, selected from the group consisting of CO.sub.2, propane, butane, pentane, petroleum ether, water, and having a critical temperature, T.sub.k, and a critical pressure, P.sub.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: April 30, 1991
    Assignee: Fried. Krupp GmbH
    Inventors: Eckhard Haeffner, Hedi Ben-Nasr, Bernd Knuth, Hubert Jasper, Klaus Reimann