Patents by Inventor L. Matthew Kirchman

L. Matthew Kirchman 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).

  • Solid metallocene catalyst system
    Patent number: 6852660
    Abstract: A solid metallocene-containing catalyst system of an organoaluminoxane, at least one metallocene having at least one olefinically unsaturated substituent and a polyolefin is disclosed. The polyolefin is formed from at least one olefin polymerized in the presence of a combination of a solution of the organoluminoxane in an aromatic liquid, the at least one metallocene, and an aliphatic liquid. The solid metallocene-containing catalyst system may also include one or more the particulate solids.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: February 8, 2005
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Kent E. Mitchell, Gary L. Glass, L. Matthew Kirchman, Robert K. Provence, Leigh A. Ford, Randall S. Muninger
  • Solid metallocene catalyst system
    Publication number: 20030144436
    Abstract: A solid metallocene-containing catalyst system of an organoaluminoxane, at least one metallocene having at least one olefinically unsaturated substituent and a polyolefin is disclosed. The polyolefin is formed from at least one olefin polymerized in the presence of a combination of a solution of the organoluminoxane in an aromatic liquid, the at least one metallocene, and an aliphatic liquid. The solid metallocene-containing catalyst system may also include one or more the particulate solids.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 31, 2003
    Inventors: Kent E. Mitchell, Gary L. Glass, L. Matthew Kirchman, Robert K. Provence, Leigh A. Ford, Randall S. Muninger
  • Method for making and using a metallocene catalyst system
    Patent number: 6534609
    Abstract: Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metallocene having a substituent which has olefinic unsaturation in an aliphatic liquid to form a liquid catalyst system, conducting prepolymerization of an olefin in the liquid catalyst system, preferably in multiple stages, and separating the resulting solid metallocene-containing catalyst system from the reaction mixture. Also polymerization of olefins using the inventive solid catalyst system is disclosed.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: March 18, 2003
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Kent E. Mitchell, Gary L. Glass, L. Matthew Kirchman, Robert K. Provence, Leigh A. Ford, Randall S. Muninger
  • Method for making and using a metallocene catalyst system
    Publication number: 20020177676
    Abstract: Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metallocene having a substituent which has olefinic unsaturation in an aliphatic liquid to form a liquid catalyst system, conducting prepolymerization of an olefin in the liquid catalyst system, preferably in multiple stages, and separating the resulting solid metallocene-containing catalyst system from the reaction mixture. Also polymerization of olefins using the inventive solid catalyst system is disclosed.
    Type: Application
    Filed: March 13, 2001
    Publication date: November 28, 2002
    Inventors: Kent E. Mitchell, Gary L. Glass, L. Matthew Kirchman, Robert K. Provence, Leigh A. Ford, Randall S. Muninger