Patents by Inventor Dusan Jeremic

Dusan Jeremic 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 having a ketimide ligand
    Patent number: 6114481
    Abstract: A catalyst system comprises an organometallic complex of a group 4 metal having a ketimide ligand. The organometallic complex preferably also contains a cyclic ligand which forms a delocalized pi-bond with the metal (such as a cyclopentadienyl-type ligand). Preferred organometallic complexes may be activated with a so-called "substantially non coordinating anion" to form a low cost cocatalyst system which is excellent for the preparation of olefin copolymers having both high molecular weight and very low density.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: September 5, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: John McMeeking, Xiaoliang Gao, Rupert Edward von Haken Spence, Stephen John Brown, Dusan Jeremic
  • Titanium process for making catalyst
    Patent number: 6046126
    Abstract: The present invention provides a novel process for preparing a catalyst, preferably free of electron donor, useful in gas phase polymerization of olefins having a broad polydispersity.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: April 4, 2000
    Inventors: Mark Kelly, Dusan Jeremic, Victoria Ker, Charles Russell