Patents by Inventor Rajagopalan Thiruvengadathan

Rajagopalan Thiruvengadathan 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).

  • Patent number: 10336661
    Abstract: An energetic nanocomposite includes fuel nanoparticles and oxidizer nanoparticles covalently bonded to negatively charged functionalized graphene sheets. A preferred example includes Al fuel nanoparticles and Bi2O3 nanoparticles. A preferred method of formation mixes a solution of positively charged fuel nanoparticles, positively charged oxidizer nanoparticles, and negatively charged functionalized graphene sheets having functional groups to bond with the positively charged fuel nanoparticles and positively charged oxidizer nanoparticles. Self-assembly of the energetic nanocomposite is permitted over a predetermined time via the attraction and aggregation of the positively charged fuel nanoparticles positively charged oxidizer nanoparticles and negatively charged functionalized graphene sheets. Additional methods and nanocomposites include unfunctionalized graphene sheets, which can be commercial grade sheets.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: July 2, 2019
    Assignee: The Curators of the University of Missouri
    Inventors: Shubhra Gangopadhyay, Stephen W. Chung, Rajagopalan Thiruvengadathan, Clay Stephen Staley, Keshab Gangopadhyay, Kristofer Emile Raymond
  • Publication number: 20150034220
    Abstract: An energetic nanocomposite includes fuel nanoparticles and oxidizer nanoparticles covalently bonded to negatively charged functionalized graphene sheets. A preferred example includes Al fuel nanoparticles and Bi2O3 nanoparticles. A preferred method of formation mixes a solution of positively charged fuel nanoparticles, positively charged oxidizer nanoparticles, and negatively charged functionalized graphene sheets having functional groups to bond with the positively charged fuel nanoparticles and positively charged oxidizer nanoparticles. Self-assembly of the energetic nanocomposite is permitted over a predetermined time via the attraction and aggregation of the positively charged fuel nanoparticles positively charged oxidizer nanoparticles and negatively charged functionalized graphene sheets. Additional methods and nanocomposites include unfunctionalized graphene sheets, which can be commercial grade sheets.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 5, 2015
    Inventors: Shubhra Gangopadhyay, Stephen W. Chung, Rajagopalan Thiruvengadathan, Clay Stephen Staley, Keshab Gangopadhyay, Kristofer Emile Raymond
  • Patent number: 8512490
    Abstract: The invention provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles are introduced into the metal oxide nanostructure via wet impregnation.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: August 20, 2013
    Assignee: The Curators of the University of Missouri
    Inventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnystin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhushan Mehendale, Steve Apperson, Sved Barizuddin, Keshab Gangopadhyay
  • Publication number: 20130000800
    Abstract: The invention provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles are introduced into the metal oxide nanostructure via wet impregnation.
    Type: Application
    Filed: September 7, 2012
    Publication date: January 3, 2013
    Applicant: The Curators of the University of Missouri
    Inventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnystin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhushan Mehendale, Steven Apperson, Syed Barizuddin, Keshab Gangopadhyay
  • Patent number: 8293040
    Abstract: The invention provides homogeneous mesoporous metal oxide nanoenergetic composites. A composite of the invention has a regular and uniform nanostructure of metal oxide, which is structured by a surfactant. Metal fuel nanoparticles are homogenously distributed through the regular and uniform nanostructure. The invention further provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles into the metal oxide nanostructure via wet impregnation.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: October 23, 2012
    Assignee: The Curators of the University of Missouri
    Inventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnytsin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhusban Mehendale, Steven Apperson, Syed Barizuddin, Keshab Gangopadhyay
  • Patent number: 8066831
    Abstract: A method of generating power uses a nanoenergetic material. The nanoenergetic material comprising thermite is obtained and deposited on a substrate. An igniter is placed on the nanoenergetic material. When power is desired, the nanoenergetic material is ignited. A transducer receives thermal, sonic, magnetic, optic and/or mechanical energy from combustion of the nanoenergetic material and converts it into electrical energy. Preferably, the transducer is a thermoelectric, piezoelectric or magneto device. Preferably, multiple transducers are integrated in one power generators to maximize the power from nanoenergetic thermites.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: November 29, 2011
    Assignee: The Curators of the University of Missouri
    Inventors: Shubhra Gangopadhyay, Steven Apperson, Keshab Gangopadhyay, Andrey Bezmelnitsyn, Rajagopalan Thiruvengadathan, Michael Kraus, Rajesh Shende, Maruf Hossain, Senthil Subramanian, Shantanu Bhattacharya, Yuangang Gao
  • Publication number: 20110167795
    Abstract: In various embodiments, the present disclosure provides a thruster that utilizes a nanothermite material as a propellant. The thruster generally includes a body having at least one sidewall and a bottom wall that define a propellant chamber having a closed repulsion end and an opposing open exhaust end. The thruster additionally includes a nanothermite propellant configured within the propellant chamber to have a selected density that dictates a reaction propagation rate of the nanothermite propellant such that the reaction propagation rate will have a selected one of two distinctly different force-time profiles.
    Type: Application
    Filed: April 20, 2010
    Publication date: July 14, 2011
    Applicant: CURATORS OF THE UNIVERSITY OF MISSOURI
    Inventors: Shubhra Gangopadhyay, Steve Apperson, Keshab Gangopadhyay, Rajagopalan Thiruvengadathan, Andrey Bezmelnitsyn
  • Publication number: 20100279102
    Abstract: The invention provides homogeneous mesoporous metal oxide nanoenergetic composites. A composite of the invention has a regular and uniform nanostructure of metal oxide, which is structured by a surfactant. Metal fuel nanoparticles are homogenously distributed through the regular and uniform nanostructure. The invention further provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles into the metal oxide nanostructure via wet impregnation.
    Type: Application
    Filed: December 11, 2007
    Publication date: November 4, 2010
    Inventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnytsin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhusban Mehendale, Steven Apperson, Syed Barizuddin, Keshab Gangopadhyay
  • Publication number: 20090152873
    Abstract: A method of generating power uses a nanoenergetic material. The nanoenergetic material comprising thermite is obtained and deposited on a substrate. An igniter is placed on the nanoenergetic material. When power is desired, the nanoenergetic material is ignited. A transducer receives thermal, sonic, magnetic, optic and/or mechanical energy from combustion of the nanoenergetic material and converts it into electrical energy. Preferably, the transducer is a thermoelectric, piezoelectric or magneto device. Preferably, multiple transducers are integrated in one power generators to maximize the power from nanoenergetic thermites.
    Type: Application
    Filed: October 27, 2006
    Publication date: June 18, 2009
    Inventors: Shubhra Gangopadhyay, Steven Apperson, Keshab Gangopadhyay, Andrey Bezmelnitsyn, Rajagopalan Thiruvengadathan, Michael Kraus, Rajesh Shende, Maruf Hossain, Senthil Subramanian, Shantanu Bhattacharya, Yuangang Gao
  • Publication number: 20080152899
    Abstract: The invention provides metastable intermolecular composites that have good thermite properties while also being relatively insensitive to electrostatic discharge ignition. A preferred embodiment metastable intermolecular composite has a metal oxide nanostructure, which can be coated with an energetic polymer via a molecular linker or loaded with a gas generating polymer. Metal fuel nanoparticles coated with an energetic polymer via a molecular linker are closely associated with said metal oxide nanostructure. Methods of making metastable intermolecular composites are also provided by the invention.
    Type: Application
    Filed: December 11, 2007
    Publication date: June 26, 2008
    Inventors: Shubhra Gangopadhyah, Rajagopalan Thiruvengadathan, Andrey Bezmelnytsin, Steven Apperson, Keshab Gangopadhyay