Patents by Inventor Wilfried Wassermann

Wilfried Wassermann 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).

  • Catalyst systems for Ziegler-Natta propene polymerisation
    Patent number: 7351678
    Abstract: The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R?, R1 and R1? independently of one another represent branched or unbranched C1-C7 alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or alkynyl; R2 represents unsubstituted, monoalkylated or polyalkylated and/or monofluorinated or polyfluorinated aromatic hydrocarbons from group (II); R3 and R4 independently of one another represent CH2, CF2 oder C(R1)2; m stands for 0, 1 or 2; n stands for 0, 1 or 2; o stands for 0 or 1, all independently of one another.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: April 1, 2008
    Assignee: Merck Patent GmbH
    Inventors: Kartin Köhler, Herbert Schumann, Birgit Corinna Wassermann, Wilfried Wassermann, Katharina Lange, Sebastian Dechert, Markus Hummert, Stefan Schutte, Walter Kaminsky, Andrea Eisenhardt, Björn Heuer, Andre Laban
  • Catalyst systems for ziegler-natta propene polymerisation
    Publication number: 20040242408
    Abstract: The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R′, R1 and R1′ independently of one another represent branched or unbranched C1-C7 alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or alkynyl; R2 represents unsubstituted, monoalkylated or polyalkylated and/or monofluorinated or polyfluorinated aromatic hydrocarbons from group (II); R3 and R4 independently of one another represent CH2, CF2 oder C(R1)2; m stands for 0, 1 or 2; n stands for 0, 1 or 2; o stands for 0 or 1, all independently of one another. Said systems exhibit improved characteristics in terms of activity and stereoselectivity in comparison to conventional co-catalysts such as AlEt3 and can act simultaneously as co-catalysts and stereoselectivity promoters.
    Type: Application
    Filed: April 8, 2004
    Publication date: December 2, 2004
    Inventors: Katrin Kohler, Herbert Schumann, Birgit Corinna Wassermann, Wilfried Wassermann, Katharina Lange, Sebastian Dechert, Markus Hummert, Stefan Schutte, Walter Kaminsky, Andrea Eisenhardt, Bjorn Heuer, Andre Laban
  • Organometallic compounds
    Patent number: 5259915
    Abstract: The invention relates to organometallic compounds of the elements aluminum, gallium and indium which are two-fold intramolecularly stabilized, and to the use thereof for the production of thin films and epitaxial layers by deposition from the liquid or solid phase.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: November 9, 1993
    Assignee: Merck Patent Gesellschaft Beschrankter Haftung
    Inventors: Ludwig Pohl, Herbert Schumann, Wilfried Wassermann, Uwe Hartmann, Thomas Seuss
  • Organometallic compounds
    Patent number: 5149853
    Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: September 22, 1992
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Dietrich Erdmann, Max E. Van Ghemen, Ludwig Pohl, Herbert Schumann, Uwe Hartmann, Wilfried Wassermann, Meino Heyen, Holger Jurgensen
  • Organometallic compounds
    Patent number: 5112432
    Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: May 12, 1992
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Dietrich Erdmann, Max E. Van Ghemen, Ludwig Pohl, Herbert Schumann, Uwe Hartmann, Wilfried Wassermann, Meino Heyen, Holger Jurgensen
  • Organometallic compounds
    Patent number: 4880492
    Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
    Type: Grant
    Filed: September 15, 1987
    Date of Patent: November 14, 1989
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Dietrich Erdmann, Max E. Van Ghemen, Ludwig Pohl, Herbert Schumann, Uwe Hartmann, Wilfried Wassermann, Meino Heyen, Holger Jurgensen