Patents by Inventor Charlotte K. Williams

Charlotte K. Williams 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).

  • Bimetallic catalytic complexes for the polymerisation of carbon dioxide and an epoxide
    Patent number: 9994675
    Abstract: The present invention provides a novel catalyst of formula (I): wherein M is selected from Zn(H), Co(II), Mn(II), Mg(II), Fe(II), Cr(III)-X or Fe(III)-X, and the use thereof in polymerizing carbon dioxide and an epoxide.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: June 12, 2018
    Assignee: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Michael Kember, Paul Knight
  • Bimetallic catalytic complexes for the copolymerization of carbon dioxide and an epoxide
    Patent number: 9453104
    Abstract: The present invention provides a novel catalyst of formula (I): wherein M is selected from Zn(H), Co(II), Mn(II), Mg(II), Fe(II), Cr(III)-X or Fe(III)-X, and the use thereof in polymerizing carbon dioxide and an epoxide.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: September 27, 2016
    Assignee: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Michael Kember, Paul Knight
  • Method of synthesising polycarbonates in the presence of a bimetallic catalyst and a chain transfer agent
    Patent number: 9006347
    Abstract: The invention provides a process for the synthesis of a polycarbonate, the process comprising the step of reacting carbon dioxide with at least one epoxide in the presence of a catalyst of formula (I) and a chain transfer agent. The invention also provides a polymerization system for the copolymerization of carbon dioxide and at least one epoxide comprising a catalyst of formula (I) and a chain transfer agent, polycarbonates produced by the inventive process, a block copolymer comprising a polycarbonate produced by the inventive process, and a method of producing the block copolymer. The invention also relates to novel catalysts of formula (III).
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: April 14, 2015
    Assignee: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Michael Kember, Antoine Buchard, Fabian Jutz
  • NOVEL BIMETALLIC CATALYTIC COMPLEXES FOR THE POLYMERISATION OF CARBON DIOXIDE AND AN EPOXIDE
    Publication number: 20150051370
    Abstract: The present invention provides a novel catalyst of formula (I): wherein M is selected from Zn(H), Co(II), Mn(II), Mg(II), Fe(II), Cr(III)-X or Fe(III)-X, and the use thereof in polymerising carbon dioxide and an epoxide.
    Type: Application
    Filed: October 28, 2014
    Publication date: February 19, 2015
    Applicant: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Michael Kember, Paul Knight
  • METHOD OF SYNTHESISING POLYCARBONATES IN THE PRESENCE OF A BIMETALLIC CATALYST AND A CHAIN TRANSFER AGENT
    Publication number: 20140249279
    Abstract: The invention provides a process for the synthesis of a polycarbonate, the process comprising the step of reacting carbon dioxide with at least one epoxide in the presence of a catalyst of formula (I) and a chain transfer agent. The invention also provides a polymerisation system for the copolymerisation of carbon dioxide and at least one epoxide comprising a catalyst of formula (I) and a chain transfer agent, polycarbonates produced by the inventive process, a block copolymer comprising a polycarbonate produced by the inventive process and a method of producing the same. The invention also relates to novel catalysts of formula (III).
    Type: Application
    Filed: March 7, 2014
    Publication date: September 4, 2014
    Applicant: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Michael Kember, Antoine Buchard, Fabian Jutz
  • Carbohydrate lactone polymers
    Patent number: 8476402
    Abstract: The present invention relates to a novel carbohydrate lactone, functionalized aliphatic polyesters and copolymers formed therefrom, and processes for the preparation thereof from renewable resources.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 2, 2013
    Assignee: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Molly Morag Stevens, Min Tang
  • BIMETALLIC CATALYTIC COMPLEXES FOR THE COPOLYMERISATION OF CARBON DIOXIDE AND AN EPOXIDE
    Publication number: 20110118435
    Abstract: The present invention provides a novel catalyst of formula (I): wherein M is selected from Zn(H), Co(II), Mn(II), Mg(II), Fe(II), Cr(III)-X or Fe(III)-X, and the use thereof in polymerising carbon dioxide and an epoxide.
    Type: Application
    Filed: April 24, 2009
    Publication date: May 19, 2011
    Applicant: Imperial Innovations Limited
    Inventors: Charlotte K Williams, Michael Kember, Paul Knight
  • CARBOHYDRATE LACTONE POLYMERS
    Publication number: 20110077380
    Abstract: The present invention relates to a novel carbohydrate lactone, functionalized aliphatic polyesters and copolymers formed therefrom, and processes for the preparation thereof from renewable resources.
    Type: Application
    Filed: March 27, 2009
    Publication date: March 31, 2011
    Applicant: IMPERIAL INNOVATIONS LIMITED
    Inventors: Charlotte K. Williams, Molly Morag Stevens, Min Tang