Patents by Inventor Steven Clemens

Steven Clemens 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).

  • Ethylene-cyclic mono olefin copolymerizations
    Patent number: 12209176
    Abstract: The copolymerization of ethylene with a cyclic mono olefin (such as norbornene) is conducted in the presence of a catalyst system comprising a bridged hafnocene catalyst and a three part activator. The catalyst system provides excellent activity at high polymerization temperatures. Copolymers produced according to this invention have unique microstructure (with methyl branching being observed) and unique rheology.
    Type: Grant
    Filed: October 9, 2023
    Date of Patent: January 28, 2025
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, XiaoChuan Wang, Peter Zoricak, Steven Clemens, Brian Molloy
  • ETHYLENE-CYCLIC MONO OLEFIN COPOLYMERIZATIONS
    Publication number: 20240052147
    Abstract: The copolymerization of ethylene with a cyclic mono olefin (such as norbornene) is conducted in the presence of a catalyst system comprising a bridged hafnocene catalyst and a three part activator. The catalyst system provides excellent activity at high polymerization temperatures. Copolymers produced according to this invention have unique microstructure (with methyl branching being observed) and unique rheology.
    Type: Application
    Filed: October 9, 2023
    Publication date: February 15, 2024
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Qinyan WANG, XiaoChuan WANG, Peter ZORICAK, Steven CLEMENS, Brian MOLLOY
  • Ethylene-cyclic mono olefin copolymerizations
    Patent number: 11827775
    Abstract: The copolymerization of ethylene with a cyclic mono olefin (such as norbornene) is conducted in the presence of a catalyst system comprising a bridged hafnocene catalyst and a three part activator. The catalyst system provides excellent activity at high polymerization temperatures. Copolymers produced according to this invention have unique microstructure (with methyl branching being observed) and unique rheology.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 28, 2023
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, XiaoChuan Wang, Peter Zoricak, Steven Clemens, Brian Molloy
  • ETHYLENE-CYCLIC MONO OLEFIN COPOLYMERIZATIONS
    Publication number: 20220119628
    Abstract: The copolymerization of ethylene with a cyclic mono olefin (such as norbornene) is conducted in the presence of a catalyst system comprising a bridged hafnocene catalyst and a three part activator. The catalyst system provides excellent activity at high polymerization temperatures. Copolymers produced according to this invention have unique microstructure (with methyl branching being observed) and unique rheology.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 21, 2022
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Qinyan WANG, XiaoChuan WANG, Peter ZORICAK, Steven CLEMENS, Brian MOLLOY
  • Ziegler-Natta catalyst for high temperature polymerization
    Patent number: 10590214
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: March 17, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • Ziegler-Natta catalyst for high temperature polymerization
    Patent number: 10442880
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: October 15, 2019
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • ZIEGLER-NATTA CATALYST FOR HIGH TEMPERATURE POLYMERIZATION
    Publication number: 20180282453
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Application
    Filed: June 6, 2018
    Publication date: October 4, 2018
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • ZIEGLER-NATTA CATALYST FOR HIGH TEMPERATURE POLYMERIZATION
    Publication number: 20180118863
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Application
    Filed: December 21, 2017
    Publication date: May 3, 2018
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • ZIEGLER-NATTA CATALYST FOR HIGH TEMPERATURE POLYMERIZATION
    Publication number: 20170037163
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Application
    Filed: October 4, 2016
    Publication date: February 9, 2017
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • Ziegler-Natta catalyst for high temperature polymerization
    Patent number: 9481748
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: November 1, 2016
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • ZIEGLER-NATTA CATALYST FOR HIGH TEMPERATURE POLYMERIZATION
    Publication number: 20160046745
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Application
    Filed: August 12, 2014
    Publication date: February 18, 2016
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber