Patents by Inventor Ronald G. Cavell

Ronald G. Cavell 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).

  • Phosphorus supported carbene transition metal complexes
    Patent number: 6852843
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene atom or heteroalkane radical bonded to the (transition) metal.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: February 8, 2005
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Phosphinimine methanide transition metal catalysts
    Patent number: 6696532
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphinimine centers bonded to the (transition) metal.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: February 24, 2004
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Aluminum complexes for olefin polymerization
    Patent number: 6686491
    Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes, containing additional heteroatoms which are useful in the polymerization of olefins.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: February 3, 2004
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Aparna Kasani
  • Phosphorus supported carbene transition metal complexes
    Publication number: 20030158394
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene atom or heteroalkane radical bonded to the (transition) metal.
    Type: Application
    Filed: February 3, 2003
    Publication date: August 21, 2003
    Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Ronald G. Cavell, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Phosphinimine methanide transition metal catalysts
    Publication number: 20030114696
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphinimine centers bonded to the (transition) metal.
    Type: Application
    Filed: September 18, 2002
    Publication date: June 19, 2003
    Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Phosphorus supported carbene transition metal complexes
    Patent number: 6538115
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene atom or heteroalkane radical bonded to the (transition) metal.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: March 25, 2003
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Novel aluminum complexes for olefin polymerization
    Publication number: 20030028041
    Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes, containing additional heteroatoms which are useful in the polymerization of olefins.
    Type: Application
    Filed: July 19, 2002
    Publication date: February 6, 2003
    Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Ronald G. Cavell, Qinyan Wang, Aparna Kasani
  • Aluminum complexes for olefin polymerization
    Patent number: 6492474
    Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes which are useful in the polymerization of olefins.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: December 10, 2002
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Phosphinimine methanide transition metal catalysts
    Patent number: 6476245
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphinimine centers bonded to the (transition) metal.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: November 5, 2002
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Phosphorus supported carbene transition metal complexes
    Publication number: 20020161205
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene atom or heteroalkane radical bonded to the (transition) metal.
    Type: Application
    Filed: January 26, 2001
    Publication date: October 31, 2002
    Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Ronald G. Cavell, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Aluminum complexes for olefin polymerization
    Patent number: 6444834
    Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes, containing additional heteroatoms which are useful in the polymerization of olefins.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: September 3, 2002
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Aparna Kasani
  • Carbene transition metal catalysts
    Patent number: 6313331
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene structure or heteroalkane radical bonded to the (transition) metal.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: November 6, 2001
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Aluminum complexes for olefin polymerization
    Publication number: 20010018534
    Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes which are useful in the polymerization of olefins.
    Type: Application
    Filed: March 15, 2001
    Publication date: August 30, 2001
    Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Aluminum complexes for olefin polymerization
    Patent number: 6235919
    Abstract: It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes which are useful in the polymerization of olefins.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: May 22, 2001
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Carbene transition metal catalysts
    Patent number: 6060568
    Abstract: The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene structure or heteroalkane radical bonded to the (transition) metal.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: May 9, 2000
    Assignee: The Governors of the University of Alberta
    Inventors: Ronald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
  • Olefin oligomerization in the presence of novel complexes
    Patent number: 5557023
    Abstract: The present invention relates to the oligomerization of lower alpha olefins, and particularly ethylene, to higher olefins in the presence of a catalyst precursor having either or both of a dithiophosphinate complex and a heterobifunctional ligand having a phosphine center and an imine or similar center, in the presence of an activator. The catalysts have a high reactivity and a good selectivity.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: September 17, 1996
    Assignee: The Governors of the University of Alberta
    Inventors: Arpad F. Somogyvari, Beth L. Creed, Antonio P. Nicola, Alan R. Sanger, David J. Law, Ronald G. Cavell
  • Carbonylation of methanol using a novel transition metal catalyst
    Patent number: 5352813
    Abstract: An improved process is provided for the carbonylation of methanol to acetic acid and/or its derivatives, especially methyl acetate, under mild reaction conditions using a novel catalyst precursor. The precursor is a transition metal complex having a heterodifunctional bidentate phosphorus--nitrogen ligand attached to the metal. The carbonylation reaction can now typically be carried out at 80.degree. C. and CO pressure of 40 p.s.i.g.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: October 4, 1994
    Assignee: University of Alberta
    Inventors: Ronald G. Cavell, Kattesh V. Katti
  • Hydrogenation process with transition metal catalysts derived from bifunctional phosphorus-nitrogen ligands
    Patent number: 5334791
    Abstract: A process is provided for hydrogenating a non-aromatic unsaturated hydrocarbon, comprising reacting the hydrocarbon with a catalyst precursor which includes a source of a group VIIIB transition metal from the second or third rows of the periodic table and a heterobifunctional ligand constructed with a phosphine center and an imine nitrogen center, in the presence of hydrogen and a promoter selected from secondary or tertiary acyclic alkyl amines in a suitable solvent which solubilizes the hydrocarbon, the catalyst precursor, the hydrogen, and the promoter.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: August 2, 1994
    Assignee: Ligands Inc.
    Inventors: Ronald G. Cavell, David J. Law, Robert W. Reed