Patents by Inventor Annette Bollman

Annette Bollman 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).

  • Trimerisation and oligomerisation of olefins using a chromium based catalyst
    Patent number: 7554001
    Abstract: The invention provides a mixed heteroatomic ligand for an oligomerization of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is sulfur and at least two heteroatoms are not the same. The invention also provides a multidentate mixed heteroatomic ligand for an oligomerization of olefins catalyst, which ligand includes at least three heteroatoms of which at least one is a sulfur atom. The ligand may also contain, in addition to sulfur, at least one nitrogen or phosphorous heteroatom.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: June 30, 2009
    Assignee: Sasol Technology (Pty) Ltd.
    Inventors: John Thomas Dixon, Peter Wasserscheid, David Shane McGuinness, Fiona Millicent Hess, Hulisani Maumela, David Hedley Morgan, Annette Bollman
  • TRIMERISATION AND OLIGOMERISATION OF OLEFINS USING A CHROMIUM BASED CATALYST
    Publication number: 20080200744
    Abstract: The invention provides a mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is sulfur and at least two heteroatoms are not the same. The invention also provides a multidentate mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms of which at least one is a sulfur atom. The ligand may also contain, in addition to sulfur, at least one nitrogen or phosphorous heteroatom.
    Type: Application
    Filed: October 16, 2007
    Publication date: August 21, 2008
    Applicant: Sasol Technology (PTY) LTD.
    Inventors: John Thomas Dixon, Peter Wasserscheid, David Shane McGuinness, Fiona Millicent Hess, Hulisani Maumela, David Hedley Morgan, Annette Bollman
  • Trimerisation and oligomerisation of olefins using a chromium based catalyst
    Patent number: 7361623
    Abstract: The invention provides a mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is nitrogen and at least two heteroatoms are not the same. The invention also provides a multidentate mixed heroatomic ligand for an oligomerization of olefins catalyst, which ligand includes at least three heteroatoms. At least one heteroatom may be nitrogen and at least 2 heteroatoms may not be the same.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: April 22, 2008
    Assignee: Sasol Technology (Pty) Ltd.
    Inventors: John Thomas Dixon, Jacobus Johannes Cronje Grove, Peter Wasserscheid, David Shane McGuinness, Fiona Millicent Hess, Hulisani Maumela, David Hedley Morgan, Annette Bollman
  • Trimerisation and oligomerisation of olefins using a chromium based catalyst
    Patent number: 7300904
    Abstract: The invention provides a mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is sulfur and at least 2 heteroatoms are not the same. The invention also provides a multidentate mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms of which at least one is a sulfur atom. The ligand may also contain, in addition to sulfur, at least one nitrogen or phosphorous heteroatom.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: November 27, 2007
    Assignee: Sasol Technology (Pty) Ltd.
    Inventors: John Thomas Dixon, Peter Wasserscheid, David Shane McGuinness, Fiona Millicent Hess, Hulisani Maumela, David Hedley Morgan, Annette Bollman
  • Trimerisation and oligomerisation of olefins using a chromium based catalyst
    Publication number: 20050119516
    Abstract: The invention provides a mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is nitrogen and at least two heteroatoms are not the same. The invention also provides a multidentate mixed heroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms. At least one heteroatom may be nitrogen and at least 2 heteroatoms may not be the same.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 2, 2005
    Inventors: John Dixon, Jacobus Grove, Peter Wasserscheid, David McGuinness, Fiona Hess, Hulisani Maumela, David Morgan, Annette Bollman