Patents by Inventor Christopher Dobbins

Christopher Dobbins 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).

  • Publication number: 20220082040
    Abstract: A lance injector assembly for an aftertreatment system comprises a shaft configured to extend into an exhaust conduit of the aftertreatment system, the shaft being hollow so as to define a cavity. A supply line is disposed within the cavity defined by the shaft. The supply line is configured to receive a liquid reductant, and an outlet of the supply line is fluidly coupled to an opening defined in the shaft. A heating element is located in the cavity and configured to selectively heat the liquid reductant flowing through the supply line to generate gaseous reductant to be expelled from the outlet of the supply line.
    Type: Application
    Filed: September 10, 2021
    Publication date: March 17, 2022
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Gaurav Hemant Pandit, Christopher Dobbins, Padmanabha Reddy Ettireddy, Stephen M. Holl, John G. Buechler
  • Patent number: 11111368
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: September 7, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 11015044
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: May 25, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20200325317
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 15, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 10738183
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: August 11, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20200056024
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Application
    Filed: August 30, 2019
    Publication date: February 20, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20200056025
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Application
    Filed: August 30, 2019
    Publication date: February 20, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 10442920
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: October 15, 2019
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 10442921
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: October 15, 2019
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20190256698
    Abstract: This disclosure relates to caps and closures manufactured from an ethylene interpolymer product, or a blend containing an ethylene interpolymer product.
    Type: Application
    Filed: May 2, 2019
    Publication date: August 22, 2019
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Xiaochuan Wang, Tieqi Li, Fazle Sibtain, Christopher Dobbin, Kenneth Taylor, Hamidreza Khakdaman, Brian Molloy
  • Patent number: 10329412
    Abstract: This disclosure relates to caps and closures manufactured from an ethylene interpolymer product, or a blend containing an ethylene interpolymer product.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: June 25, 2019
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaochuan Wang, Tieqi Li, Fazle Sibtain, Christopher Dobbin, Kenneth Taylor, Hamidreza Khakdaman, Brian Molloy
  • Publication number: 20180305532
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Application
    Filed: April 19, 2017
    Publication date: October 25, 2018
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20180305531
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Application
    Filed: April 19, 2017
    Publication date: October 25, 2018
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20180230298
    Abstract: This disclosure relates to caps and closures manufactured from an ethylene interpolymer product, or a blend containing an ethylene interpolymer product.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 16, 2018
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Xiaochuan Wang, Tieqi Li, Fazle Sibtain, Christopher Dobbin, Kenneth Taylor, Hamidreza Khakdaman, Brian Molloy
  • Patent number: 10023706
    Abstract: This disclosure relates to rotomolded articles, having a wall structure, where the wall structure contains at least one layer containing an ethylene interpolymer product, or a blend containing an ethylene interpolymer product and an ethylene polymer, where the ethylene interpolymer product has a Dilution Index (Yd) greater than 0 and improved Environmental Stress Crack Resistance (ESCR). The ethylene interpolymer product has a melt index from about 0.5 to about 15 dg/minute, a density from about 0.930 to about 0.955 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 6 and a CDBI50 from about 50% to about 98%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: July 17, 2018
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Celine Bellehumeur, Brian Molloy, Hamidreza Khakdaman, XiaoChuan Wang, Tieqi Li, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor
  • Patent number: 10023729
    Abstract: This disclosure relates to films comprising at least one layer of an ethylene interpolymer product. The ethylene interpolymer product comprises a first ethylene interpolymer, a second ethylene interpolymer and optionally a third ethylene interpolymer; wherein the ethylene interpolymer product has ?0.03 terminal vinyl unsaturations per 100 carbon atoms and ?3 parts per million (ppm) of a total catalytic metal; and optionally a Dilution Index, Yd, greater than 0. The disclosed ethylene interpolymer products have a melt index from about 0.4 to about 10 dg/minute, a density from about 0.900 to about 0.940 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 12 and a CDBI50 from about 20% to about 98%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: July 17, 2018
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Marcelo Yamane, Tieqi Li, Xiaochuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Edward Taylor, Hamidreza Khakdaman, Stephen John Brown
  • Publication number: 20170267822
    Abstract: This disclosure relates to rotomolded articles, having a wall structure, where the wall structure contains at least one layer containing an ethylene interpolymer product, or a blend containing an ethylene interpolymer product and an ethylene polymer, where the ethylene interpolymer product has a Dilution Index (Yd) greater than 0 and improved Environmental Stress Crack Resistance (ESCR). The ethylene interpolymer product has a melt index from about 0.5 to about 15 dg/minute, a density from about 0.930 to about 0.955 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 6 and a CDBI50 from about 50% to about 98%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 21, 2017
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Celine Bellehumeur, Brian Molloy, Hamidreza Khakdaman, XiaoChuan Wang, Tieqi Li, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor
  • Publication number: 20160229996
    Abstract: This disclosure relates to films comprising at least one layer of an ethylene interpolymer product. The ethylene interpolymer product comprises a first ethylene interpolymer, a second ethylene interpolymer and optionally a third ethylene interpolymer; wherein the ethylene interpolymer product has ?0.03 terminal vinyl unsaturations per 100 carbon atoms and ?3 parts per million (ppm) of a total catalytic metal; and optionally a Dilution Index, Yd, greater than 0. The disclosed ethylene interpolymer products have a melt index from about 0.4 to about 10 dg/minute, a density from about 0.900 to about 0.940 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 12 and a CDBI50 from about 20% to about 98%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.
    Type: Application
    Filed: April 21, 2016
    Publication date: August 11, 2016
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Marcelo Yamane, Tieqi Li, Xiaochuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Edward Taylor, Hamidreza Khakdaman, Stephen John Brown
  • Publication number: 20060041074
    Abstract: Novel polyethylene copolymer compositions prepared with a homogeneous catalyst system are characterized by having a unique high molecular weight, low comonomer (high density) fraction. These heterogeneous/homogeneous compositions may be prepared using a solution polymerization process in which the polymerization reactor contains a gradient in temperature, catalyst concentration or monomer concentration. The heterogeneous/homogeneous compositions of this invention are easily processed into films having excellent tear strengths and low hexane extractables.
    Type: Application
    Filed: October 24, 2005
    Publication date: February 23, 2006
    Inventors: Stephen Brown, Christopher Dobbin, Clayton Elston, Norman Aubee, Gilbert Arnould, Sarah Marshall, Lawrence Kale, Mark Weber
  • Publication number: 20050017409
    Abstract: The cycle time for a rotomolding process is improved through the use of a molding material comprising a blend of at least two polyethylenes having narrow molecular weight distributions and homogeneous comonomer distributions. Alternatively, the molding temperature may be reduced to conserve energy and reduce energy costs. The polyethylene blend also has a narrow molecular weight distribution of less than 3 and a density of from 0.930 to 0.950 g/cc. Rotomolded parts prepared from the blend composition have excellent impact resistance and are also resistant to warpage. A preferred process employs a blend composition which contains a blend component having a higher molecular weight and a lower density than another blend component—this blend may be used to prepare rotomolded parts with warpage resistance and improved environmental stress crack resistance (ESCR). A highly preferred process uses a blend composition which further contains aminor amount (from 0.
    Type: Application
    Filed: July 8, 2004
    Publication date: January 27, 2005
    Inventors: Mark Weber, Philippa Hocking, Stephen Brown, Christopher Dobbin