Patents by Inventor Claire Tova Cohen

Claire Tova Cohen 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).

  • Polycarbonates made using highly selective catalysts
    Patent number: 8278239
    Abstract: Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl? or OBzF5?. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: October 2, 2012
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Geoffrey W. Coates, Zengquan Qin, Claire Tova Cohen
  • POLYCARBONATES MADE USING HIGHLY SELECTIVE CATALYSTS
    Publication number: 20100204437
    Abstract: Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl? or OBzF5?. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
    Type: Application
    Filed: April 27, 2010
    Publication date: August 12, 2010
    Applicant: CORNELL RESEARCH FOUNDATION, INC.
    Inventors: Geoffrey W. Coates, Zengquan Qin, Claire Tova Cohen
  • Polycarbonates made using highly selective catalysts
    Patent number: 7723256
    Abstract: Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl? or OBzF5?. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: May 25, 2010
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Geoffrey W. Coates, Zengquan Qin, Claire Tova Cohen
  • Polycarbonates made using highly selective catalysts
    Patent number: 7674873
    Abstract: Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl? or OBzF5?. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: March 9, 2010
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Geoffrey W. Coates, Zengquan Qin, Claire Tova Cohen
  • Polycarbonates made using highly selective catalysts
    Patent number: 7304172
    Abstract: Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl? or OBzF5?. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: December 4, 2007
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Geoffrey W. Coates, Zengquan Qin, Claire Tova Cohen