Patents by Inventor Roxanna Lea Whitfield

Roxanna Lea Whitfield 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).

  • Patent number: 6586538
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a metallocene catalyst and dinitrogen monoxide in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the production of polyolefins by introducing dinitrogen monoxide into the polymerization medium.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: July 1, 2003
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Glenn Edward Moore
  • Patent number: 6417296
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a Ziegler-Natta catalyst comprising at least one transition metal compound and at least one organometallic co-catalyst compound and tetrahydrofuran in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also disclosed is a process for reducing electrostatic charge in an olefin polymerization medium.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: July 9, 2002
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Kenneth Alan Dooley, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Alan George Wonders
  • Publication number: 20010044505
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a metallocene catalyst and dinitrogen monoxide in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the production of polyolefins by introducing dinitrogen monoxide into the polymerization medium.
    Type: Application
    Filed: May 15, 2001
    Publication date: November 22, 2001
    Inventors: Randal Ray Ford, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Glenn Edward Moore
  • Patent number: 6313236
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with an olefin polymerization catalyst and at least one ether comprising at least one carbon-oxygen-carbon linkage (C—O—C) of the formula R1—O(—R2—O)m—R3 in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also disclosed is a process for reducing electrostatic charge in an olefin polymerization medium.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: November 6, 2001
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Kenneth Alan Dooley, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Alan George Wonders
  • Patent number: 6300432
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with at least one Ziegler-Natta catalyst comprising a component comprising at least one transition metal and a co-catalyst comprising at least one organometallic compound and at least one compound comprising at least one carbon-oxygen-carbon linkage (C—O—C) of the formula R1—O(—R2—O)m—R3 in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also disclosed is a process for reducing electrostatic charge in an olefin polymerization medium.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: October 9, 2001
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Kenneth Alan Dooley, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Alan George Wonders
  • Publication number: 20010025089
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a Ziegler-Natta catalyst comprising at least one transition metal compound and at least one organometallic co-catalyst compound and tetrahydrofuran in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also disclosed is a process for reducing electrostatic charge in an olefin polymerization medium.
    Type: Application
    Filed: March 27, 2001
    Publication date: September 27, 2001
    Inventors: Randal Ray Ford, Kenneth Alan Dooley, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Alan George Wonders
  • Patent number: 6288181
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a metallocene catalyst and at least one ether comprising at least one carbon-oxygen-carbon linkage (C—O—C) of the formula R1—O(—R2—O)m—R3 in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also disclosed is a process for reducing electrostatic charge in an olefin polymerization medium.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: September 11, 2001
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Kenneth Alan Dooley, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Alan George Wonders
  • Patent number: 6191238
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with a Ziegler-Natta catalyst and dinitrogen monoxide in an amount sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the polymerization of an olefin by adding dinitrogen monoxide.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: February 20, 2001
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Glenn Edward Moore
  • Patent number: 6187879
    Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with an olefin polymerization catalyst and dinitrogen monoxide in an amount sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the polymerization of an olefin by adding dinitrogen monoxide.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: February 13, 2001
    Assignee: Eastman Chemical Company
    Inventors: Randal Ray Ford, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Glenn Edward Moore