Patents by Inventor Rex E. Murray

Rex E. Murray 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).

  • Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates
    Publication number: 20130245210
    Abstract: The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index.
    Type: Application
    Filed: May 7, 2013
    Publication date: September 19, 2013
    Applicant: Chevron Philips Chemical Company LP
    Inventors: Albert P. Masino, Rex E. Murray, Qing Yang, Steve J. Secora, Kumudini C. Jayaratne, William B. Beaulieu, Errun Ding, Gary L. Glass, Alan L. Solenberger, Ted H. Cymbaluk
  • Nano-linked metallocene catalyst compositions and their polymer products
    Patent number: 8524626
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: September 3, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • Use of hydrogen scavenging catalysts to control polymer molecular weight and hydrogen levels in a polymerization reactor
    Patent number: 8501654
    Abstract: The present invention provides dual catalyst systems containing a metallocene catalyst and a hydrogen scavenging catalyst, and polymerization processes employing these dual catalyst systems. Due to a reduction in hydrogen levels in the polymerization processes, olefin polymers produced from these polymerization processes may have a higher molecular weight, a lower melt index, and higher levels of unsaturation.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: August 6, 2013
    Assignee: Chevron Philips Chemical Company LP
    Inventors: Rex E. Murray, William B. Beaulieu, Qing Yang, Errun Ding, Gary L. Glass, Alan L. Solenberger, Steven J. Secora
  • Dual metallocene catalyst systems for decreasing melt index and increasing polymer production rates
    Patent number: 8450436
    Abstract: The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: May 28, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Albert P. Masino, Rex E. Murray, Qing Yang, Steve J. Secora, Kumudini C. Jayaratne, William B. Beaulieu, Errun Ding, Gary L. Glass, Alan L. Solenberger, Ted H. Cymbaluk
  • Nano-linked heteronuclear metallocene catalyst compositions and their polymer products
    Patent number: 8426536
    Abstract: The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins are also provided.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: April 23, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin, Gary L. Glass
  • Method and system for forming a precursor compound for non-bridged unsymmetric polyolefin polymerization catalyst
    Patent number: 8367853
    Abstract: The present techniques relates generally to polyolefin catalysts and, more specifically, to preparing a precursor compound for an unsymmetric metallocene catalyst, for using the precursor compound to prepare catalysts, and for employing the precursor compounds to prepare catalysts for polyolefin polymerizations.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: February 5, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Rex E. Murray, Richard M. Buck
  • Dual metallocene catalyst systems for decreasing melt index and increasing polymer production rates
    Patent number: 8329834
    Abstract: The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: December 11, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Albert P. Masino, Rex E. Murray, Qing Yang, Steve J. Secora, Kumudini C. Jayaratne, William B. Beaulieu, Errun Ding, Gary L. Glass, Alan L. Solenberger, Ted H. Cymbaluk
  • Nano-linked metallocene catalyst compositions and their polymer products
    Patent number: 8329833
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: December 11, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • Imino Carbene Compounds and Derivatives, and Catalyst Compositions Made Therefrom
    Publication number: 20120271018
    Abstract: The present invention provides imino carbene compounds and their derivatives, catalyst compositions containing these compounds in combination with an activator, and polymerization processes using these catalyst compositions to polymerize one or more olefins.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 25, 2012
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Rex E. Murray, LeGrande Mancel Slaughter, III, Dipesh Prema, Jinhui Chen
  • USE OF HYDROGEN SCAVENGING CATALYSTS TO CONTROL POLYMER MOLECULAR WEIGHT AND HYDROGEN LEVELS IN A POLYMERIZATION REACTOR
    Publication number: 20120238712
    Abstract: The present invention provides dual catalyst systems containing a metallocene catalyst and a hydrogen scavenging catalyst, and polymerization processes employing these dual catalyst systems. Due to a reduction in hydrogen levels in the polymerization processes, olefin polymers produced from these polymerization processes may have a higher molecular weight, a lower melt index, and higher levels of unsaturation.
    Type: Application
    Filed: June 5, 2012
    Publication date: September 20, 2012
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Rex E. MURRAY, William B. BEAULIEU, Qing YANG, Errun DING, Gary L. GLASS, Alan L. SOLENBERGER, Steve J. SECORA
  • Use of hydrogen scavenging catalysts to control polymer molecular weight and hydrogen levels in a polymerization reactor
    Patent number: 8207280
    Abstract: The present invention provides dual catalyst systems containing a metallocene catalyst and a hydrogen scavenging catalyst, and polymerization processes employing these dual catalyst systems. Due to a reduction in hydrogen levels in the polymerization processes, olefin polymers produced from these polymerization processes may have a higher molecular weight, a lower melt index, and higher levels of unsaturation.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: June 26, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, William B. Beaulieu, Qing Yang, Errun Ding, Gary L. Glass, Alan L. Solenberger, Steven J. Secora
  • Nano-Linked Metallocene Catalyst Compositions and Their Polymer Products
    Publication number: 20120149855
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Application
    Filed: February 20, 2012
    Publication date: June 14, 2012
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • NANO-LINKED HETERONUCLEAR METALLOCENE CATALYST COMPOSITIONS AND THEIR POLYMER PRODUCTS
    Publication number: 20120149854
    Abstract: The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins are also provided.
    Type: Application
    Filed: February 16, 2012
    Publication date: June 14, 2012
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: REX E. MURRAY, KUMUDINI C. JAYARATNE, QING YANG, JOEL L. MARTIN, GARY L. GLASS
  • Nano-linked heteronuclear metallocene catalyst compositions and their polymer products
    Patent number: 8143430
    Abstract: The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins are also provided.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: March 27, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin, Gary L. Glass
  • Nano-linked metallocene catalyst compositions and their polymer products
    Patent number: 8143183
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: March 27, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • Nano-Linked Metallocene Catalyst Compositions and Their Polymer Products
    Publication number: 20120058886
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Application
    Filed: November 3, 2011
    Publication date: March 8, 2012
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • Nano-linked metallocene catalyst compositions and their polymer products
    Patent number: 8080681
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: December 20, 2011
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • Nano-Linked Metallocene Catalyst Compositions and Their Polymer Products
    Publication number: 20110288321
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Application
    Filed: August 1, 2011
    Publication date: November 24, 2011
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin
  • METHOD AND SYSTEM FOR FORMING A PRECURSOR COMPOUND FOR NON-BRIDGED UNSYMMETRIC POLYOLEFIN POLYMERIZATION CATALYST
    Publication number: 20110275848
    Abstract: The present techniques relates generally to polyolefin catalysts and, more specifically, to preparing a precursor compound for an unsymmetric metallocene catalyst, for using the precursor compound to prepare catalysts, and for employing the precursor compounds to prepare catalysts for polyolefin polymerizations.
    Type: Application
    Filed: July 19, 2011
    Publication date: November 10, 2011
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Rex E. Murray, Richard M. Buck
  • Nano-linked metallocene catalyst compositions and their polymer products
    Patent number: 8012900
    Abstract: The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 6, 2011
    Assignee: Chevron Phillips Chemical Company, L.P.
    Inventors: Rex E. Murray, Kumudini C. Jayaratne, Qing Yang, Joel L. Martin