Patents by Inventor Christine Jacqueline Chabrand

Christine Jacqueline Chabrand 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 compositions and process for preparing polyolefins
    Patent number: 5714425
    Abstract: Catalyst compositions comprising metallocene complexes having polymerisable olefinic groups substituent on an organic group containing a cyclopentadienyl nucleus may be used for the preparation of polyolefins. The catalyst compositions may be in the form of polymers comprising the metallocene complex and may be suitably supported on inorganic supports. Polymers having a broad range of density and melt indices as well as low hexane extractables and excellent powder morphology and flowability may be obtained by use of the catalyst compositions. Preferred metallocene complexes are zirconium complexes in which the polymerisable olefinic group is vinyl.
    Type: Grant
    Filed: August 10, 1995
    Date of Patent: February 3, 1998
    Assignee: BP Chemicals Limited
    Inventors: Christine Jacqueline Chabrand, Ian Raymond Little, John Paul McNally
  • Catalyst compositions and process for preparing polyolefins
    Patent number: 5714555
    Abstract: Catalyst compositions comprising metallocene complexes having polymerisable may be used for the preparation of polyolefins.The catalyst compositions may be in the form of polymers comprising the metallocene complex and may be suitably supported on inorganic supports. Polymers having a broad range of density and melt indices as well as low hexane extractables and excellent powder morphology and flowability may be obtained by use of the catalyst compositions. Preferred metallocene complexes are zirconium complexes in which the polymerisable group is vinyl.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 3, 1998
    Assignee: BP Chemicals Limited
    Inventors: Christine Jacqueline Chabrand, Ian Raymond Little, John Paul McNally