Patents by Inventor Liting Li

Liting Li 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).

  • Perfluoronaphthyl substituted boron containing catalyst activator
    Patent number: 6635597
    Abstract: A catalyst activator particularly adapted for use in the activation of metal complexes of metals of Group 3-10 for polymerization of ethylenically unsaturated polymerizable monomers, especially olefins, comprising a neutral (Lewis acid) or charge separated (cation/anion pair) comprising a boron ligand containing a fluorinated organic group containing from 10 to 1000 non-hydrogen atoms.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: October 21, 2003
    Assignee: Northwestern University
    Inventors: Tobin J. Marks, Liting Li, You-Xian Chen, Mark H. McAdon, Peter N. Nickias
  • Bimetallic complexes and polymerization catalysts therefrom
    Patent number: 6153776
    Abstract: Group 3-6 or Lanthanide metal complexes possessing two metal centers, catalysts derived therefrom by combining the same with strong Lewis acids, Bronsted acid salts, salts containing a cationic oxidizing agent or subjected to bulk electrolysis in the presence of compatible, inert non-coordinating anions and the use of such catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers are disclosed.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: November 28, 2000
    Assignee: The Dow Chemical
    Inventors: Jasson T. Patton, Tobin J. Marks, Liting Li