Patents by Inventor Muthuvijayan Jegathesan

Muthuvijayan Jegathesan 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).

  • Aliphatic diol-based polycarbonates, method of making, and articles formed therefrom
    Patent number: 7807772
    Abstract: Disclosed herein is a copolymer comprising isosorbide carbonate units and a polysiloxane block, wherein the copolymer comprises greater than or equal to 50 mol % isosorbide carbonate units.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: October 5, 2010
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Gautam Chatterjee, Dibakar Dhara, Muthuvijayan Jegathesan
  • Aliphatic diol-based polycarbonates, method of making, and articles formed therefrom
    Patent number: 7718755
    Abstract: The above-described and other deficiencies of the art are met by a method of making a polycarbonate polymer comprising isosorbide carbonate units, comprising melt reacting a dihydroxy compound comprising an isosorbide of the general formula (2a): and an activated carbonate, in the presence of a catalyst consisting essentially of a sodium salt capable of providing a hydroxide ion, wherein the polycarbonate polymer comprises greater than or equal to 50 mol % isosorbide carbonate units, and wherein the polycarbonate polymer has a Mw of greater than or equal to about 40,000 g/mol as determined by gel-permeation chromatography relative to polystyrene standards. Polycarbonates comprising the isosorbide carbonate unit, including isosorbide homopolycarbonate and an isosorbide-based polyester-polycarbonate, are also disclosed, as are a thermoplastic composition and an article including the isosorbide-based polycarbonate polymer.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: May 18, 2010
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Guatam Chatterjee, Dibakar Dhara, Muthuvijayan Jegathesan
  • ALIPHATIC DIOL-BASED POLYCARBONATES, METHOD OF MAKING, AND ARTICLES FORMED THEREFROM
    Publication number: 20100120993
    Abstract: Disclosed herein is a copolymer comprising isosorbide carbonate units and a polysiloxane block, wherein the copolymer comprises greater than or equal to 50 mol % isosorbide carbonate units.
    Type: Application
    Filed: December 23, 2009
    Publication date: May 13, 2010
    Applicant: SABIC Innovative Plastics, IP B.V.
    Inventors: Gautam Chatterjee, Dibakar Dhara, Muthuvijayan Jegathesan
  • ALIPHATIC DIOL-BASED POLYCARBONATES, METHOD OF MAKING, AND ARTICLES FORMED THEREFROM
    Publication number: 20090105444
    Abstract: The above-described and other deficiencies of the art are met by a method of making a polycarbonate polymer comprising isosorbide carbonate units, comprising melt reacting a dihydroxy compound comprising an isosorbide of the general formula (2a): and an activated carbonate, in the presence of a catalyst consisting essentially of a sodium salt capable of providing a hydroxide ion, wherein the polycarbonate polymer comprises greater than or equal to 50 mol % isosorbide carbonate units, and wherein the polycarbonate polymer has a Mw of greater than or equal to about 40,000 g/mol as determined by gel-permeation chromatography relative to polystyrene standards. Polycarbonates comprising the isosorbide carbonate unit, including isosorbide homopolycarbonate and an isosorbide-based polyester-polycarbonate, are also disclosed, as are a thermoplastic composition and an article including the isosorbide-based polycarbonate polymer.
    Type: Application
    Filed: October 18, 2007
    Publication date: April 23, 2009
    Inventors: Gautam Chatterjee, Dibakar Dhara, Muthuvijayan Jegathesan