Patents by Inventor Mark E. Kertok

Mark E. Kertok 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 homopolymers or copolymers having good machine direction (MD) elmendorf tear strength
    Patent number: 7572875
    Abstract: This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI, increased melt strength, and good MD tear properties.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: August 11, 2009
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Michael D. Jensen, Joel L. Martin, Max P. McDaniel, Qing Yang, Matthew G. Thorn, Elizabeth A. Benham, Ted H. Cymbaluk, Ashish M. Sukhadia, Rajendra K. Krishnaswamy, Mark E. Kertok
  • Polymerization catalysts and process for producing bimodal polymers in a single reactor
    Patent number: 7312283
    Abstract: Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions and methods disclosed herein provide ethylene polymers having a HLMI of from about 0.5 to about 25, a polymer density of from about 0.920 to about 0.965, and a polydispersity of from about 3.0 to about 30.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: December 25, 2007
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Joel L. Martin, Matthew G. Thorn, Max P. McDaniel, Michael D. Jensen, Qing Yang, Paul J. DesLauriers, Mark E. Kertok
  • Resins that yield low haze films and the process for their production
    Patent number: 7199073
    Abstract: Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are provided. Methods for preparing and using the catalyst and polyolefins are also provided. The compositions and methods disclosed herein provide ethylene polymers having decreased haze while minimizing impact on other properties, such as dart impact.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: April 3, 2007
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Joel L. Martin, Elizabeth A. Benham, Mark E. Kertok, Michael D. Jensen, Max P. McDaniel, Gil R. Hawley, Qing Yang, Matthew G. Thorn, Ashish M. Sukhadia
  • Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf tear strength
    Patent number: 7119153
    Abstract: This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI, increased melt strength, and good MD tear properties.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: October 10, 2006
    Inventors: Michael D. Jensen, Joel L. Martin, Max P. McDaniel, Qing Yang, Matthew G. Thorn, Elizabeth A. Benham, Ted H. Cymbaluk, Ashish M. Sukhadia, Rajendra K. Krishnaswamy, Mark E. Kertok
  • Carbon black reactor
    Patent number: 4623521
    Abstract: Vanes operatively attached to external sleeves are provided in a conduit to implement on the outside of the conduit change in the swirl angle of incoming fluids.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: November 18, 1986
    Assignee: Phillips Petroleum Company
    Inventors: Mark L. Gravley, Mark E. Kertok
  • Mixing apparatus
    Patent number: 4502858
    Abstract: A mixing apparatus particularly useful in carbon black pelleting has two parallel pinned shafts. The pins on each shaft are arranged in a double helix fashion with the pins interdigitating. The pins of each double helix are composed of two subsets of pins arranged in a single helix which single helices are, however, axially offset from each other. Thereby at any given axial location alternatingly opposite pin action is provided in the interdigitating zone, while surging of power is avoided.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: March 5, 1985
    Assignee: Phillips Petroleum Company
    Inventor: Mark E. Kertok