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).

  • Polymers with improved ESCR for blow molding applications
    Patent number: 9169337
    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: March 12, 2014
    Date of Patent: October 27, 2015
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Vivek Rohatgi, Jeffrey F. Greco, Yongwoo Inn, Qing Yang, Alfred E. Brown, Jr.
  • POLYMERS WITH IMPROVED ESCR FOR BLOW MOLDING APPLICATIONS
    Publication number: 20150259444
    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: March 12, 2014
    Publication date: September 17, 2015
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Vivek Rohatgi, Jeffrey F. Greco, Yongwoo Inn, Qing Yang, Alfred E. Brown, JR.
  • Boron-Bridged Metallocene Catalyst Systems and Polymers Produced Therefrom
    Publication number: 20150141598
    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: April 17, 2014
    Publication date: May 21, 2015
    Applicant: 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
    Publication number: 20150141597
    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: November 12, 2014
    Publication date: May 21, 2015
    Inventor: Jeffrey F. Greco
  • Catalyst Systems Containing Boron-Bridged Cyclopentadienyl-Fluorenyl Metallocene Compounds With An Alkenyl Substituent
    Publication number: 20150141599
    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: November 5, 2014
    Publication date: May 21, 2015
    Inventor: Jeffrey F. Greco