Patents by Inventor Donald R. Loveday

Donald R. Loveday 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 composition, method of polymerization, and polymer therefrom
    Publication number: 20020052453
    Abstract: Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.
    Type: Application
    Filed: May 24, 2001
    Publication date: May 2, 2002
    Inventors: Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Catalyst systems and their use in a polymerization process
    Patent number: 6380328
    Abstract: The present invention relates to mixed catalyst system of a Group 15 containing metal catalyst compound, a bulky ligand metallocene-type catalyst compound, and a Lewis acid aluminum containing activator and to a supported version thereof and for their use in a process for polymerizing olefin(s).
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: April 30, 2002
    Assignee: Univation Technologies, LLC
    Inventors: David H. McConville, Matthew W. Holtcamp, Donald R. Loveday
  • Polymerization catalyst systems, their use, their products and articles thereof
    Publication number: 20020040114
    Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process.
    Type: Application
    Filed: March 14, 2001
    Publication date: April 4, 2002
    Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
  • Catalyst composition, method of polymerization, and polymer therefrom
    Publication number: 20010044508
    Abstract: Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.
    Type: Application
    Filed: May 24, 2001
    Publication date: November 22, 2001
    Inventors: Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Mixed catalyst compounds, catalyst systems and thier use in a polymerization process
    Publication number: 20010031695
    Abstract: The present invention relates to mixed catalyst compositions of a Group 15 containing hafnium catalyst compound and a bulky ligand metallocene-type catalyst compound, a unsupported and supported catalyst systems thereof and to a process for polymerizing olefin(s) utilizing them.
    Type: Application
    Filed: April 6, 2001
    Publication date: October 18, 2001
    Inventors: Donald R. Loveday, David H. McConville
  • Polymerization catalyst systems, their use, their products and articles thereof
    Publication number: 20010031698
    Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process.
    Type: Application
    Filed: March 14, 2001
    Publication date: October 18, 2001
    Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
  • Catalyst composition, method of polymerization, and polymer therefrom
    Patent number: 6274684
    Abstract: Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: August 14, 2001
    Assignee: Univation Technologies, LLC
    Inventors: Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Mixed catalyst compounds, catalyst systems and their use in a polymerization process
    Patent number: 6271323
    Abstract: The present invention relates to mixed catalyst compositions of a Group 15 containing hafnium catalyst compound and a bulky ligand metallocene-type catalyst compound, a unsupported and supported catalyst systems thereof and to a process for polymerizing olefin(s) utilizing them.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: August 7, 2001
    Assignee: Univation Technologies, LLC
    Inventors: Donald R. Loveday, David H. McConville
  • Polymerization catalyst systems comprising substituted hafnocenes
    Patent number: 6248845
    Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process. The hafnocene compound comprises at least one ligand substituted with at least one linear or iso alkyl substituent of at least 3 carbon atoms, and the catalyst system may comprise a mixture of two or more such hafnocenes.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: June 19, 2001
    Assignee: Univation Technologies
    Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao