Patents by Inventor Timothy Frederick Llewellyn McKenna

Timothy Frederick Llewellyn McKenna 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).

  • Ziegler-Natta produced polyethylene and methods thereof
    Patent number: 11780942
    Abstract: A process of producing a composition comprising a copolymer of ethylene and one or more C4-C8 ?-olefins, may include copolymerizing the ethylene and the one or more C4-C8 ?-olefins in the presence of a procatalyst and an alkylaluminum cocatalyst. The procatalyst may be a Ti-containing Ziegler Natta procatalyst and the polymerization may include the procatalyst and the alkylaluminum cocatalyst in amounts such that a molar ratio of Al:Ti ranges from about 0.5 to about 50.0.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: October 10, 2023
    Assignee: Braskem S.A.
    Inventors: Márcia Silva Lacerda Miranda, Olavo Martins Junior, Yue Yu, Christophe Boisson, Timothy Frederick Llewellyn McKenna
  • ZIEGLER-NATTA PRODUCED POLYETHYLENE AND METHODS THEREOF
    Publication number: 20210122858
    Abstract: A process of producing a composition comprising a copolymer of ethylene and one or more C4-C8 ?-olefins, may include copolymerizing the ethylene and the one or more C4-C8 ?-olefins in the presence of a procatalyst and an alkylaluminum cocatalyst. The procatalyst may be a Ti-containing Ziegler Natta procatalyst and the polymerization may include the procatalyst and the alkylaluminum cocatalyst in amounts such that a molar ratio of Al:Ti ranges from about 0.5 to about 50.0.
    Type: Application
    Filed: October 26, 2020
    Publication date: April 29, 2021
    Applicant: Braskem S.A.
    Inventors: Márcia Silva Lacerda Miranda, Olavo Martins Junior, Yue Yu, Christophe Boisson, Timothy Frederick Llewellyn McKenna