Patents by Inventor Jeffrey F. Greco

Jeffrey F. Greco 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 catalysts prepared from solid alkoxymagnesium halide supports
    Patent number: 11478781
    Abstract: Catalyst systems containing a titanium alkoxymagnesium halide supported catalyst component can be used for the polymerization of olefins. The catalyst can be prepared from a microcrystalline solid alkoxymagnesium halide support having a lattice spacing in the 5 nm to 15 nm range.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: October 25, 2022
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeffrey F. Greco, Jim B. Askew
  • Ziegler-Natta Catalysts Prepared From Solid Alkoxymagnesium Halide Supports
    Publication number: 20200398258
    Abstract: Catalyst systems containing a titanium alkoxymagnesium halide supported catalyst component can be used for the polymerization of olefins. The catalyst can be prepared from a microcrystalline solid alkoxymagnesium halide support having a lattice spacing in the 5 nm to 15 nm range.
    Type: Application
    Filed: June 19, 2019
    Publication date: December 24, 2020
    Inventors: Jeffrey F. Greco, Jim B. Askew
  • Boron-Bridged metallocene catalyst systems and polymers produced therefrom
    Patent number: 9988470
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, cyclopentadienyl-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene homopolymers produced using these catalyst compositions can be characterized by a density less than 0.97 g/cm3 and a melt index greater than 50 g/10 min.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: June 5, 2018
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Jeffrey F. Greco
  • Boron-Bridged bis-indenyl metallocene catalyst systems and polymers produced therefrom
    Patent number: 9944735
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, bis-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a density less than 0.92 g/cm3 and a melt index greater than 25 g/10 min.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: April 17, 2018
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Jeffrey F. Greco
  • Heterogeneous Ziegler-Natta catalysts with fluorided silica-coated alumina
    Patent number: 9845367
    Abstract: Catalyst systems containing a Ziegler-Natta catalyst component are disclosed. Such catalyst systems can contain a co-catalyst and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: December 19, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Errun Ding, Jeffrey F. Greco, Qing Yang, Youlu Yu
  • Heterogeneous Ziegler-Natta catalysts with fluorided silica-coated alumina
    Patent number: 9758599
    Abstract: Catalyst systems containing a Ziegler-Natta catalyst component are disclosed. Such catalyst systems can contain a co-catalyst and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: September 12, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Errun Ding, Qing Yang, Lloyd W. Guatney, Jeffrey F. Greco
  • Heterogeneous Ziegler-Natta Catalysts with Fluorided Silica-Coated Alumina
    Publication number: 20170088639
    Abstract: Catalyst systems containing a Ziegler-Natta catalyst component are disclosed. Such catalyst systems can contain a co-catalyst and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.
    Type: Application
    Filed: September 24, 2015
    Publication date: March 30, 2017
    Inventors: Errun Ding, Qing Yang, Lloyd W. Guatney, Jeffrey F. Greco
  • Heterogeneous Ziegler-Natta Catalysts with Fluorided Silica-Coated Alumina
    Publication number: 20170088646
    Abstract: Catalyst systems containing a Ziegler-Natta catalyst component are disclosed. Such catalyst systems can contain a co-catalyst and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.
    Type: Application
    Filed: September 24, 2015
    Publication date: March 30, 2017
    Inventors: Errun Ding, Jeffrey F. Greco, Qing Yang, Youlu Yu
  • Boron-Bridged Metallocene Catalyst Systems and Polymers Produced Therefrom
    Publication number: 20170081439
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, cyclopentadienyl-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene homopolymers produced using these catalyst compositions can be characterized by a density less than 0.97 g/cm3 and a melt index greater than 50 g/10 min.
    Type: Application
    Filed: December 1, 2016
    Publication date: March 23, 2017
    Inventors: Jeffrey F. Greco, Qing Yang, Tony R. Crain
  • Boron-Bridged Bis-Indenyl Metallocene Catalyst Systems and Polymers Produced Therefrom
    Publication number: 20170015769
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, bis-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a density less than 0.92 g/cm3 and a melt index greater than 25 g/10 min.
    Type: Application
    Filed: September 29, 2016
    Publication date: January 19, 2017
    Inventor: Jeffrey F. Greco
  • Ziegler-natta—metallocene dual catalyst systems with activator-supports
    Patent number: 9540457
    Abstract: Catalyst systems having both a metallocene catalyst component and a Ziegler-type catalyst component are disclosed. Such catalyst systems can contain a metallocene compound, a co-catalyst, and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: January 10, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Errun Ding, Qing Yang, Lloyd W. Guatney, Jeffrey F. Greco
  • Boron-bridged metallocene catalyst systems and polymers produced therefrom
    Patent number: 9540465
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, cyclopentadienyl-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene homopolymers produced using these catalyst compositions can be characterized by a density less than 0.97 g/cm3 and a melt index greater than 50 g/10 min.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: January 10, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeffrey F. Greco, Qing Yang, Tony R. Crain
  • Boron-bridged bis-indenyl metallocene catalyst systems and polymers produced therefrom
    Patent number: 9481750
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, bis-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a density less than 0.92 g/cm3 and a melt index greater than 25 g/10 min.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: November 1, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Jeffrey F. Greco
  • Polymers with improved ESCR for blow molding applications
    Patent number: 9475898
    Abstract: Disclosed herein are ethylene-based polymers having a higher molecular weight component and a lower molecular weight component, and characterized by a density greater than 0.945 g/cm3, a melt index less than 1.5 g/10 min, and a ratio of high load melt index to melt index ranging from 40 to 175. These polymers have the processability of chromium-based resins, but with improved stiffness and stress crack resistance, and can be used in blow molding and other end-use applications.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: October 25, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Vivek Rohatgi, Jeffrey F. Greco, Yongwoo Inn, Qing Yang, Alfred E. Brown, Jr.
  • Catalyst systems containing boron-bridged cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent
    Patent number: 9469702
    Abstract: Disclosed herein are catalyst compositions containing boron-bridged, cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a combination of a flat or a conventional comonomer distribution and low levels of long chain branching.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: October 18, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Jeffrey F. Greco
  • Catalyst Systems Containing Boron-Bridged Cyclopentadienyl-Fluorenyl Metallocene Compounds With An Alkenyl Substituent
    Publication number: 20160159943
    Abstract: Disclosed herein are catalyst compositions containing boron-bridged, cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a combination of a flat or a conventional comonomer distribution and low levels of long chain branching.
    Type: Application
    Filed: February 18, 2016
    Publication date: June 9, 2016
    Inventor: Jeffrey F. Greco
  • Boron-Bridged Bis-Indenyl Metallocene Catalyst Systems and Polymers Produced Therefrom
    Publication number: 20160159948
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, bis-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a density less than 0.92 g/cm3 and a melt index greater than 25 g/10 min.
    Type: Application
    Filed: February 16, 2016
    Publication date: June 9, 2016
    Inventor: Jeffrey F. Greco
  • Boron-bridged bis-indenyl metallocene catalyst systems and polymers produced therefrom
    Patent number: 9303110
    Abstract: Disclosed herein are catalyst compositions containing boron bridged, bis-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a density less than 0.92 g/cm3 and a melt index greater than 25 g/10 min.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: April 5, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Jeffrey F. Greco
  • Catalyst systems containing boron-bridged cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent
    Patent number: 9303109
    Abstract: Disclosed herein are catalyst compositions containing boron-bridged, cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a combination of a flat or a conventional comonomer distribution and low levels of long chain branching.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: April 5, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Jeffrey F. Greco
  • Polymers With Improved ESCR for Blow Molding Applications
    Publication number: 20160053035
    Abstract: Disclosed herein are ethylene-based polymers having a higher molecular weight component and a lower molecular weight component, and characterized by a density greater than 0.945 g/cm3, a melt index less than 1.5 g/10 min, and a ratio of high load melt index to melt index ranging from 40 to 175. These polymers have the processability of chromium-based resins, but with improved stiffness and stress crack resistance, and can be used in blow molding and other end-use applications.
    Type: Application
    Filed: September 21, 2015
    Publication date: February 25, 2016
    Inventors: Vivek Rohatgi, Jeffrey F. Greco, Yongwoo Inn, Qing Yang, Alfred E. Brown, JR.