Patents by Inventor Premkumar Sivasubramanian

Premkumar Sivasubramanian 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).

  • High capacity stabilized complex hydrides for hydrogen storage
    Patent number: 8883109
    Abstract: Complex hydrides based on Al(BH4)3 are stabilized by the presence of one or more additional metal elements or organic adducts to provide high capacity hydrogen storage material.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: November 11, 2014
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Savannah River Nuclear Solutions, LLC (SRNS)
    Inventors: Ragaiy Zidan, Rana F. Mohtadi, Christopher Fewox, Premkumar Sivasubramanian
  • Medium for the stabilization and utility of volatile or liquid hydrides of boron
    Patent number: 8802769
    Abstract: A stabilized composition containing a metal hydride of boron, including complex metal hydrides of boron, in a polyalkylsiloxane amorphous fumed silica mixture is provided. In a preferred embodiment the composition is a stabilized mixture of aluminum borohydride, polydimethylsiloxane and amorphous fumed silica. A method to prepare the stabilized mixture is also provided.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: August 12, 2014
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: PremKumar Sivasubramanian, Narayanankutty Pariyadath
  • Hydrogen release from complex metal hydrides by solvation in ionic liquids
    Patent number: 8771635
    Abstract: A hydrogen release material includes a complex metal hydride and an ionic liquid wherein the hydrogen release material has a lower hydrogen release temperature in comparison to the complex metal hydride alone. Also disclosed is a process of releasing hydrogen from a storage material including the steps of: providing a complex metal hydride; combining the metal hydride with an ionic liquid in a desired amount forming a mixture; and heating the mixture to a temperature releasing hydrogen wherein the temperature is lower in comparison to the complex metal hydride alone.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: July 8, 2014
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Rana F. Mohtadi, PremKumar Sivasubramanian
  • MEDIUM FOR THE STABILIZATION AND UTILITY OF VOLATILE OR LIQUID HYDRIDES OF BORON
    Publication number: 20130174477
    Abstract: A stabilized composition containing a metal hydride of boron, including complex metal hydrides of boron, in a polyalkylsiloxane amorphous fumed silica mixture is provided. In a preferred embodiment the composition is a stabilized mixture of aluminum borohydride, polydimethylsiloxane and amorphous fumed silica. A method to prepare the stabilized mixture is also provided.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 11, 2013
    Applicant: Toyota Motor Engin. & Manufact. N.A. (TEMA)
    Inventors: PremKumar SIVASUBRAMANIAN, Narayanankutty Pariyadath
  • HIGH CAPACITY STABILIZED COMPLEX HYDRIDES FOR HYDROGEN STORAGE
    Publication number: 20120156118
    Abstract: Complex hydrides based on Al(BH4)3 are stabilized by the presence of one or more additional metal elements or organic adducts to provide high capacity hydrogen storage material.
    Type: Application
    Filed: July 9, 2010
    Publication date: June 21, 2012
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFAC. NA (TEMA), SAVANNAH RIVER NUCLEAR SOLUTIONS, LLC (SRNS)
    Inventors: Ragaiy Zidan, Rana F. Mohtadi, Christopher Fewox, Premkumar Sivasubramanian
  • Destabilized and catalyzed borohydride for reversible hydrogen storage
    Patent number: 8124559
    Abstract: A process of forming a hydrogen storage material, including the steps of: providing a borohydride material of the formula: M(BH4)x where M is an alkali metal or an alkaline earth metal and 1?x?2; providing an alanate material of the formula: M1(AlH4)x where M1 is an alkali metal or an alkaline earth metal and 1?x?2; providing a halide material of the formula: M2Halx where M2 is an alkali metal, an alkaline earth metal or transition metal and Hal is a halide and 1?x?4; combining the borohydride, alanate and halide materials such that 5 to 50 molar percent from the borohydride material is present forming a reaction product material having a lower hydrogen release temperature than the alanate material.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: February 28, 2012
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., U.S. Department of Energy
    Inventors: Rana F. Mohtadi, Ragaiy Zidan, Joshua Gray, Ashley C. Stowe, Premkumar Sivasubramanian
  • HYDROGEN RELEASE FROM COMPLEX METAL HYDRIDES BY SOLVATION IN IONIC LIQUIDS
    Publication number: 20110280797
    Abstract: A hydrogen release material includes a complex metal hydride and an ionic liquid wherein the hydrogen release material has a lower hydrogen release temperature in comparison to the complex metal hydride alone. Also disclosed is a process of releasing hydrogen from a storage material including the steps of: providing a complex metal hydride; combining the metal hydride with an ionic liquid in a desired amount forming a mixture; and heating the mixture to a temperature releasing hydrogen wherein the temperature is lower in comparison to the complex metal hydride alone.
    Type: Application
    Filed: April 26, 2011
    Publication date: November 17, 2011
    Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Rana F. Mohtadi, PremKumar Sivasubramanian
  • DESTABILIZED AND CATALYZED BOROHYDRIDE FOR REVERSIBLE HYDROGEN STORAGE
    Publication number: 20100090162
    Abstract: A process of forming a hydrogen storage material, including the steps of: providing a borohydride material of the formula: M(BH4)x where M is an alkali metal or an alkaline earth metal and 1?x?2; providing an alanate material of the formula: M1(AlH4)x where M1 is an alkali metal or an alkaline earth metal and 1?x?2; providing a halide material of the formula: M2Halx where M2 is an alkali metal, an alkaline earth metal or transition metal and Hal is a halide and 1?x?4; combining the borohydride, alanate and halide materials such that 5 to 50 molar percent from the borohydride material is present forming a reaction product material having a lower hydrogen release temperature than the alanate material.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 15, 2010
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Rana F. Mohtadi, Ragaiy Zidan, Josh Gray, Ashley C. Stowe, Premkumar Sivasubramanian