Patents by Inventor Tony R. Crain

Tony R. Crain 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).

  • Methods for restoring metallocene solids exposed to air
    Patent number: 10550208
    Abstract: Methods for treating solid metallocene compounds that are exposed to air are disclosed. These methods include a step of contacting the exposed solid metallocene compound with a purging gas stream containing an inert gas, and optionally, subjecting the exposed solid metallocene compound to a sub-atmospheric pressure.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: February 4, 2020
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Tony R. Crain, George R. Rajaendran
  • Methods for Terminating Olefin Polymerizations
    Publication number: 20190169321
    Abstract: Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 6, 2019
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Qing Yang, Kathy S. Clear, Tony R. Crain, Timothy O. Odi
  • Methods for Restoring Metallocene Solids Exposed to Air
    Publication number: 20190144572
    Abstract: Methods for treating solid metallocene compounds that are exposed to air are disclosed. These methods include a step of contacting the exposed solid metallocene compound with a purging gas stream containing an inert gas, and optionally, subjecting the exposed solid metallocene compound to a sub-atmospheric pressure.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 16, 2019
    Inventors: Qing Yang, Tony R. Crain, George R. Rajaendran
  • Methods for terminating olefin polymerizations
    Patent number: 10273315
    Abstract: Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: April 30, 2019
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Qing Yang, Kathy S. Clear, Tony R. Crain, Timothy O. Odi
  • Methods for restoring metallocene solids exposed to air
    Patent number: 10221258
    Abstract: Methods for treating solid metallocene compounds that are exposed to air are disclosed. These methods include a step of contacting the exposed solid metallocene compound with a purging gas stream containing an inert gas, and optionally, subjecting the exposed solid metallocene compound to a sub-atmospheric pressure.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: March 5, 2019
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Tony R. Crain, George R. Rajaendran
  • Bicyclic bridged metallocene compounds and polymers produced therefrom
    Patent number: 10118975
    Abstract: Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: November 6, 2018
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
  • Bicyclic bridged metallocene compounds and polymers produced therefrom
    Patent number: 10112965
    Abstract: Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: October 30, 2018
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
  • Methods for Restoring Metallocene Solids Exposed to Air
    Publication number: 20180265606
    Abstract: Methods for treating solid metallocene compounds that are exposed to air are disclosed. These methods include a step of contacting the exposed solid metallocene compound with a purging gas stream containing an inert gas, and optionally, subjecting the exposed solid metallocene compound to a sub-atmospheric pressure.
    Type: Application
    Filed: March 17, 2017
    Publication date: September 20, 2018
    Inventors: Qing Yang, Tony R. Crain, George R. Rajaendran
  • Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution
    Patent number: 10017592
    Abstract: Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron bridged metallocene compound with a cyclopentadienyl group and an indenyl group, and a single atom bridged metallocene compound with a fluorenyl group.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: July 10, 2018
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Jeff F. Greco, Max P. McDaniel, Youlu Yu, Gary L. Glass, Tony R. Crain
  • Bicyclic Bridged Metallocene Compounds and Polymers Produced Therefrom
    Publication number: 20170342173
    Abstract: Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
    Type: Application
    Filed: August 10, 2017
    Publication date: November 30, 2017
    Inventors: Jeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
  • Bicyclic Bridged Metallocene Compounds and Polymers Produced Therefrom
    Publication number: 20170342099
    Abstract: Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
    Type: Application
    Filed: August 2, 2017
    Publication date: November 30, 2017
    Inventors: Jeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
  • Bicyclic bridged metallocene compounds and polymers produced therefrom
    Patent number: 9758540
    Abstract: Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: September 12, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
  • Bicyclic bridged metallocene compounds and polymers produced therefrom
    Patent number: 9758600
    Abstract: Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: September 12, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
  • Dual Catalyst Systems for Producing Polymers with a Broad Molecular Weight Distribution and a Uniform Short Chain Branch Distribution
    Publication number: 20170114169
    Abstract: Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron bridged metallocene compound with a cyclopentadienyl group and an indenyl group, and a single atom bridged metallocene compound with a fluorenyl group.
    Type: Application
    Filed: January 4, 2017
    Publication date: April 27, 2017
    Inventors: Qing Yang, Jeff F. Greco, Max P. McDaniel, Youlu Yu, Gary L. Glass, Tony R. Crain
  • 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
  • Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution
    Patent number: 9574031
    Abstract: Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron bridged metallocene compound with a cyclopentadienyl group and an indenyl group, and a single atom bridged metallocene compound with a fluorenyl group.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: February 21, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Jeff F. Greco, Max P. McDaniel, Youlu Yu, Gary L. Glass, Tony R. Crain
  • 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
  • Processes for preparing metallocene-based catalyst systems
    Patent number: 9493592
    Abstract: Methods for preparing single and dual metallocene catalyst systems containing an activator-support are disclosed. These methods can include precontacting of the activator-support and an organoaluminum compound, as well as sequential contacting of two different metallocene compounds to form a dual metallocene catalyst system.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: November 15, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Ted H. Cymbaluk, Max P. McDaniel, Qing Yang, Dennis L. Holtermann, Tony R. Crain
  • Methods for terminating olefin polymerizations
    Patent number: 9447204
    Abstract: Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: September 20, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Max P. McDaniel, Tony R. Crain, Kathy S. Clear
  • Processes for Preparing Metallocene-Based Catalyst Systems
    Publication number: 20160194420
    Abstract: Methods for preparing single and dual metallocene catalyst systems containing an activator-support are disclosed. These methods can include precontacting of the activator-support and an organoaluminum compound, as well as sequential contacting of two different metallocene compounds to form a dual metallocene catalyst system.
    Type: Application
    Filed: September 14, 2015
    Publication date: July 7, 2016
    Inventors: Ted H. Cymbaluk, Max P. McDaniel, Qing Yang, Dennis L. Holtermann, Tony R. Crain