Patents by Inventor Hans-Ludwig Hirsch

Hans-Ludwig Hirsch 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).

  • Coordination catalyst systems comprising intramolecularly stabilized organometallic compounds
    Patent number: 5851946
    Abstract: The invention relates to the use of intramolecularly stabilized organometallic compounds as components in coordination catalyst systems, corresponding coordination catalyst systems and processes for the preparation of polymers by coordination polymerization of unsaturated hydrocarbons by catalysed metathesis of alkenes and alkynes using such coordination catalyst systems.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: December 22, 1998
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Ludwig Pohl, Eike Poetsch, Hans-Ludwig Hirsch, Herbert Schumann, Karin Weiss
  • Coreactive photoinitiators
    Patent number: 5837746
    Abstract: Compounds of the formulaRG--A--INwherein IN is a photoinitiator basic structure A is a spacer group and RG is a functional reactive group can be employed as coreactive photoinitiators for photo-polymerization of systems containing ethylenically unsaturated compounds.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: November 17, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Manfred Kohler, Jorg Ohngemach, Eike Poetsch, Rudolf Eidenschink, Gerhard Greber, Dieter Dorsch, Jurgen Gehlhaus, Konrad Dorfner, Hans Ludwig Hirsch
  • Coreactive photoinitiators
    Patent number: 5744512
    Abstract: Compounds of the formulaRG--A--INwhereinIN is a photoinitiator basic structureA is a spacer group andRG is a functional reactive group can be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: April 28, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Manfred Kohler, Jorg Ohngemach, Eike Poetsch, Rudolf Eidenschink, Gerhard Greber, Dieter Dorsch, Jurgen Gehlhaus, Konrad Dorfner, Hans Ludwig Hirsch
  • Coordination catalyst systems
    Patent number: 5698761
    Abstract: The invention relates to the use of cyclic organometallic compounds as components in coordination catalyst systems, to corresponding coordination catalyst systems and also to processes for the preparation of polymers by coordination polymerization and of unsaturated hydrocarbons by catalyzed metathesis of alkenes and alkynes using such coordination catalyst systems.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 16, 1997
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Ludwig Pohl, Eike Poetsch, Herbert Schumann, Karin Weiss, Karl-Heinz Thiele, Hans-Ludwig Hirsch
  • Coordination catalyst systems
    Patent number: 5468707
    Abstract: The invention relates to the use of cyclic organometallic compounds as components in coordination catalyst systems, to corresponding coordination catalyst systems and also to processes for the preparation of polymers by coordination polymerization and of unsaturated hydrocarbons by catalyzed metathesis of alkenes and alkynes using such coordination catalyst systems.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: November 21, 1995
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Ludwig Pohl, Fike Poetsch, Herbert Schumann, Karin Weiss, Karl-Heinz Thiele, Hans-Ludwig Hirsch