Patents by Inventor Sumana Roy Chowdhury

Sumana Roy Chowdhury 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).

  • Polymer matrices functionalized with liquid crystals for enhanced thermal conductivity
    Patent number: 9376606
    Abstract: According to various aspects, exemplary embodiments are disclosed of thermally conductive composites that include a polymer matrix functionalized with liquid crystals grafted onto the polymer matrix. Also disclosed are methods that generally include modifying liquid crystals and incorporating the modified liquid crystals into a polymer matrix such that the modified liquid crystals are grafted onto the polymer matrix.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: June 28, 2016
    Assignee: Laird Technologies, Inc.
    Inventor: Sumana Roy Chowdhury
  • Polymer matrices functionalized with carbon-containing species for enhanced thermal conductivity
    Patent number: 9260646
    Abstract: Disclosed are thermally conductive composites that include a polymer matrix functionalized with a carbon-containing species covalently coupled with the polymer matrix. Also disclosed are methods that generally include functionalizing a carbon-containing species and incorporating the functionalized carbon-containing species into the polymer, such that the carbon-containing species are covalently bonded to the polymer matrix via a coupling agent.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: February 16, 2016
    Assignee: Laird Technologies, Inc.
    Inventors: Sumana Roy Chowdhury, Padma Priya Sudharshana, Srinivasan Duraiswamy
  • CONFORMAL COATING OF POLYMER FIBERS ON NONWOVEN SUBSTRATES
    Publication number: 20150284889
    Abstract: The present invention describes a novel process for the conformal coating of polymer fibers on nonwoven substrates. This process is based on the modification of polymer fiber surfaces by controlling the degree of etching and oxidation, which improves adhesion of initiators to the surface and facilitates subsequent conformal polymer grafting. The modified fiber surfaces render new functionalities to the surface, such as increasing hydrophilicity, attaching ligands or changing surface energy. The invention includes the modified polymer fibers produced by the process described herein.
    Type: Application
    Filed: June 22, 2015
    Publication date: October 8, 2015
    Inventors: Yong Zheng, Sumana Roy Chowdhury, Patrick Vasconcelos Gurgel, Haiyan Liu, Ruben G. Carbonell
  • POLYMER MATRICES FUNCTIONALIZED WITH LIQUID CRYSTALS FOR ENHANCED THERMAL CONDUCTIVITY
    Publication number: 20150232734
    Abstract: According to various aspects, exemplary embodiments are disclosed of thermally conductive composites that include a polymer matrix functionalized with liquid crystals grafted onto the polymer matrix. Also disclosed are methods that generally include modifying liquid crystals and incorporating the modified liquid crystals into a polymer matrix such that the modified liquid crystals are grafted onto the polymer matrix.
    Type: Application
    Filed: May 1, 2015
    Publication date: August 20, 2015
    Inventor: Sumana Roy Chowdhury
  • POLYMER MATRICES FUNCTIONALIZED WITH CARBON-COATING SPECIES FOR ENHANCED THERMAL CONDUCTIVITY
    Publication number: 20150014577
    Abstract: Disclosed are thermally conductive composites that include a polymer matrix functionalized with a carbon-containing species covalently coupled with the polymer matrix. Also disclosed are methods that generally include functionalizing a carbon-containing species and incorporating the functionalized carbon-containing species into the polymer, such that the carbon-containing species are covalently bonded to the polymer matrix via a coupling agent.
    Type: Application
    Filed: September 23, 2014
    Publication date: January 15, 2015
    Inventors: Sumana Roy Chowdhury, Padma Priya Sudharshana, Srinivasan Duraiswamy
  • CONFORMAL COATING OF POLYMER FIBERS ON NONWOVEN SUBSTRATES
    Publication number: 20110268911
    Abstract: The present invention describes a novel process for the conformal coating of polymer fibers on nonwoven substrates. This process is based on the modification of polymer fiber surfaces by controlling the degree of etching and oxidation, which improves adhesion of initiators to the surface and facilitates subsequent conformal polymer grafting. The modified fiber surfaces render new functionalities to the surface, such as increasing hydrophilicity, attaching ligands or changing surface energy. The invention includes the modified polymer fibers produced by the process described herein.
    Type: Application
    Filed: June 10, 2009
    Publication date: November 3, 2011
    Applicants: NORTH CAROLINA STATE UNIVERSITY, PATHOGEN REMOVAL AND DIAGNOSTIC TECHNOLOGIES, INC.
    Inventors: Yong Zheng, Sumana Roy Chowdhury, Patrick Vasconcelos Gurgel, Haiyan Liu, Ruben G. Carbonell