Patents by Inventor Zhaozong Jiang

Zhaozong Jiang 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).

  • Enzyme-catalyzed polycarbonate and polycarbonate ester synthesis
    Patent number: 7972822
    Abstract: An enzymatic process for preparing aliphatic polycarbonates via terpolymerization or transesterification using a dialkyl carbonate, an aliphatic diester, and an aliphatic diol or triol reactant. A catalyst having an enzyme capable of catalyzing an ester hydrolysis reaction in an aqueous environment is subsequently added to the reaction mixture. Next, polymerization of the reaction proceeds for an allotted time at a temperature?100° C. Finally, the copolymer is isolated from an the catalyst via filtration.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: July 5, 2011
    Assignee: Polytechnic Institute of New York University
    Inventors: Richard A. Gross, Zhaozong Jiang
  • Enzyme-catalyzed polycarbonate and polycarbonate ester synthesis
    Patent number: 7951899
    Abstract: An enzymatic process for preparing aliphatic polycarbonates via terpolymerization or transesterification using a dialkyl carbonate, an aliphatic diester, and an aliphatic diol or triol reactant. A catalyst having an enzyme capable of catalyzing an ester hydrolysis reaction in an aqueous environment is subsequently added to the reaction mixture. Next, polymerization of the reaction proceeds for an allotted time at a temperature ?100° C. Finally, the copolymer is isolated from an the catalyst via filtration.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: May 31, 2011
    Assignee: Polytechnic University
    Inventors: Richard A. Gross, Zhaozong Jiang
  • ENZYME-CATALYZED POLYCARBONATE AND POLYCARBONATE ESTER SYNTHESIS
    Publication number: 20100041856
    Abstract: An enzymatic process for preparing aliphatic polycarbonates via terpolymerization or transesterification using a dialkyl carbonate, an aliphatic diester, and an aliphatic diol or triol reactant. A catalyst having an enzyme capable of catalyzing an ester hydrolysis reaction in an aqueous environment is subsequently added to the reaction mixture. Next, polymerization of the reaction proceeds for an allotted time at a temperature?100° C. Finally, the copolymer is isolated from an the catalyst via filtration.
    Type: Application
    Filed: August 15, 2008
    Publication date: February 18, 2010
    Inventors: Richard A. Gross, Zhaozong Jiang
  • ENZYME-CATALYZED POLYCARBONATE AND POLYCARBONATE ESTER SYNTHESIS
    Publication number: 20090047717
    Abstract: An enzymatic process for preparing aliphatic polycarbonates via terpolymerization or transesterification using a dialkyl carbonate, an aliphatic diester, and an aliphatic diol or triol reactant. A catalyst having an enzyme capable of catalyzing an ester hydrolysis reaction in an aqueous environment is subsequently added to the reaction mixture. Next, polymerization of the reaction proceeds for an allotted time at a temperature ?100° C. Finally, the copolymer is isolated from an the catalyst via filtration.
    Type: Application
    Filed: August 18, 2008
    Publication date: February 19, 2009
    Inventors: Richard A. Gross, Zhaozong Jiang