Patents by Inventor Chris Bielawski

Chris Bielawski 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).

  • Synthesis of macrocyclic polymers by ring insertion polymerization of cyclic olefin monomers
    Patent number: 6946533
    Abstract: A method for synthesizing cyclic polymers using transition metal alkylidene complexes as reaction catalysts is provided, wherein the complexes contain a cyclic group. Polymerization is carried out on the catalyst, using cyclic olefin monomers that undergo ring insertion polymerization, and no linear intermediates are generated. Following completion of polymerization, the cyclic polymer detaches from the complex via an intramolecular chain transfer reaction and the catalytic complex is regenerated. The invention also provides novel transition metal alkylidene complexes useful as catalysts in the aforementioned process, as well as novel cyclic hydrocarbons.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: September 20, 2005
    Assignee: California Institute of Technology
    Inventors: Robert Grubbs, Chris Bielawski, Diego Benitez
  • Synthesis of macrocyclic polymers by ring insertion polymerization of cyclic olefin monomers
    Publication number: 20040132934
    Abstract: A method for synthesizing cyclic polymers using transition metal alkylidene complexes as reaction catalysts is provided, wherein the complexes contain a cyclic group. Polymerization is carried out on the catalyst, using cyclic olefin monomers that undergo ring insertion polymerization, and no linear intermediates are generated. Following completion of polymerization, the cyclic polymer detaches from the complex via an intramolecular chain transfer reaction and the catalytic complex is regenerated. The invention also provides novel transition metal alkylidene complexes useful as catalysts in the aforementioned process, as well as novel cyclic hydrocarbons.
    Type: Application
    Filed: August 1, 2003
    Publication date: July 8, 2004
    Inventors: Robert Grubbs, Chris Bielawski, Diego Benitez