Patents by Inventor Insun Yu

Insun Yu 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).

  • Dinuclear indium catalysts and their use for (Co)polymerization of cyclic esters
    Patent number: 9777023
    Abstract: Provided are novel dinuclear indium catalysts of formula (A) that are capable of living and immortal ring opening polymerization and copolymerization of cyclic ester monomers for the preparation of biodegradable polymers and copolymers, in particular polyesters. Also disclosed are polymerization methods and polymer products. These dinuclear indium catalysts allow less costly, highly reactive living polymerization of cyclic ester monomers with possible high turn over rates and/or substantial stereo-chemical and microstructure control.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: October 3, 2017
    Assignee: University of British Columbia
    Inventors: Parisa Mehrkhodavandi, Insun Yu, J. Alberto Acosta-Ramirez
  • Dinuclear Indium Catalysts and Their Use for (Co)Polymerization of Cyclic Esters
    Publication number: 20150038651
    Abstract: Provided are novel dinuclear indium catalysts of formula (A) that are capable of living and immortal ring opening polymerization and copolymerization of cyclic ester monomers for the preparation of biodegradable polymers and copolymers, in particular polyesters. Also disclosed are polymerization methods and polymer products. These dinuclear indium catalysts allow less costly, highly reactive living polymerization of cyclic ester monomers with possible high turn over rates and/or substantial stereo chemical and microstructure control.
    Type: Application
    Filed: May 18, 2012
    Publication date: February 5, 2015
    Applicant: University of British Columbia
    Inventors: Parisa Mehrkhodavandi, Insun Yu, J. Alberto Acosta-Ramirez
  • Switchable self-doped polyaniline
    Patent number: 8658759
    Abstract: A substituted polyaniline whose self-doped state can be controlled via complexation between boronic acid groups along the backbone with D-fructose in the presence of fluoride is described. For the first time, this allows the formation of a water-soluble, self-doped conducting polymer under the polymerization conditions. In turn this facilitates the growth of polyaniline over a wider pH range.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: February 25, 2014
    Assignee: University of Manitoba
    Inventors: Bhavana A. Deore, Insun Yu, Michael S. Freund
  • Tunable conducting polymer nanostructures
    Patent number: 8298443
    Abstract: A method for producing a polymer comprising reacting a fluoride and a monomer having a boronic acid moiety, or a salt thereof, in acidic aqueous solution and/or in an aliphatic alcohol. Polymerization occurs with the addition of an oxidizing agent. The method may further comprise the step of purification of the polymer by centrifugation with 0.5 M HCl and/or dispersion of the polymer in a solvent. The polymer has a morphology tunable by changing the solvent.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: October 30, 2012
    Assignee: University of Manitoba
    Inventors: Michael S. Freund, Bhavana A. Deore, Insun Yu
  • TUNABLE CONDUCTING POLYMER NANOSTRUCTURES
    Publication number: 20100270507
    Abstract: A method for producing a polymer comprising reacting a fluoride and a monomer having a boronic acid moiety, or a salt thereof, in acidic aqueous solution and/or in an aliphatic alcohol. Polymerization occurs with the addition of an oxidizing agent. The method may further comprise the step of purification of the polymer by centrifugation with 0.5 M HCl and/or dispersion of the polymer in a solvent. The polymer has a morphology tunable by changing the solvent.
    Type: Application
    Filed: January 19, 2007
    Publication date: October 28, 2010
    Inventors: Michael S. Freund, Bhavana A. Deore, Insun Yu
  • Switchable self-doped polyaniline
    Publication number: 20070093644
    Abstract: A substituted polyaniline whose self-doped state can be controlled via complexation between boronic acid groups along the backbone with D-fructose in the presence of fluoride is described. For the first time, this allows the formation of a water-soluble, self-doped conducting polymer under the polymerization conditions.
    Type: Application
    Filed: December 6, 2004
    Publication date: April 26, 2007
    Inventors: Bhavana Deore, Insun Yu, Michael Freund