Patents by Inventor Karen E. Meyer

Karen E. Meyer 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).

  • Use of silanes to enhance activity in single-site polymerizations
    Patent number: 6642326
    Abstract: A process for the polymerization of olefins is disclosed. A boraaryl catalyst precursor and an activator are used in the presence of a silane modifier. A low level of silane modifier enhances the activity of the catalyst.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: November 4, 2003
    Assignee: Equistar Chemicals, LP
    Inventors: Karen E. Meyer, Mark K. Reinking
  • Propylene polymerization process with enhanced catalyst activity
    Patent number: 6630544
    Abstract: A process for polymerizing propylene is disclosed. The process involves charging propylene and about 90 to 99% of an organoaluminum cocatalyst to a reactor and heating this mixture to at least about 50° C. This is followed by addition of a premix of 1 to 10% of the organoaluminum cocatalyst with a magnesium halide-supported Ziegler-Natta catalyst. The temperature of the reaction mixture is maintained to produce a propylene polymer. The process gives improved catalyst activity.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: October 7, 2003
    Assignee: Equistar Chemicals, LP
    Inventors: Douglas D. Klendworth, Mark K. Reinking, Edward D. Kist, Karen E. Meyer
  • Supported olefin polymerization catalysts
    Publication number: 20010041777
    Abstract: Supported heterometallocene catalysts wherein the support is a particulate polymeric material are provided. The catalysts have a transition metal complex containing at least one anionic, polymerization stable heteroatomic ligand associated with the transition metal and a boron activator compound deposited on the support. Polymeric supports used for the heterometallocene catalysts of the invention are homopolymers of ethylene and copolymers of ethylene and C3-8 &agr;-olefins.
    Type: Application
    Filed: June 12, 2001
    Publication date: November 15, 2001
    Applicant: EQUISTAR CHEMICALS, L.P.
    Inventors: Karen E. Meyer, Mark K. Reinking
  • Supported olefin polymerization catalysts
    Patent number: 6310150
    Abstract: Supported heterometallocene catalysts wherein the support is a particulate polymeric material are provided. The catalysts have a transition metal complex containing at least one anionic, polymerization stable heteroatomic ligand associated with the transition metal and a boron activator compound deposited on the support. Polymeric supports used for the heterometallocene catalysts of the invention are homopolymers of ethylene and copolymers of ethylene and C3-8 &agr;-olefins.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: October 30, 2001
    Assignee: Equistar Chemicals, L.P.
    Inventors: Karen E. Meyer, Mark K. Reinking
  • Supported olefin polymerization catalysts
    Patent number: 6281155
    Abstract: Supported heterometallocene catalysts wherein the support is a particulate polymeric material are provided. The catalysts have a transition metal complex containing at least one anionic, polymerization stable heteroatomic ligand associated with the transition metal and a boron activator compound deposited on the support. Polymeric supports used for the heterometallocene catalysts of the invention are homopolymers of ethylene and copolymers of ethylene and C3-8 &agr;-olefins.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: August 28, 2001
    Assignee: Equistar Chemicals, L.P.
    Inventors: Karen E. Meyer, Mark K. Reinking
  • Supported olefin polymerization catalysts
    Patent number: 6211311
    Abstract: A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support chemically treated with an organoaluminum, organosilicon, organomagnesium, or organoboron compound; (b) a single-site catalyst that contains a polymerization-stable, heteroatomic ligand; and (c) an activator. Chemical treatment is a key to making supported heterometallocenes that have high activity and long shelf-lives, and can effectively incorporate comonomers.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: April 3, 2001
    Assignee: Equistar Chemicals, L.P.
    Inventors: Shaotian Wang, Bradley P. Etherton, Karen E. Meyer, Michael W. Lynch, Linda N. Winslow, Leonard V. Cribbs, Jia-Chu X. Liu
  • Jigsaw puzzle and technique
    Patent number: 5022655
    Abstract: A jigsaw puzzle includes outer straight edge pieces forming a rectangular puzzle perimeter; a number of interior straight edge pieces suggesting an interior rectangle and increasing the proportion of the number of straight edge pieces to the total number of pieces in the puzzle; and a number of joiner pieces, some of the joiner pieces crossing the bounary of the interior polygon, and others of the joiner pieces at positions remote from the boundary.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: June 11, 1991
    Inventor: Karen E. Meyer