Patents by Inventor Abhijeet J. Karkamkar

Abhijeet J. Karkamkar 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).

  • COMPOSITIONS AND METHODS FOR POLARIZATION-SWITCHED, SOLID-STATE MOLECULAR PUMPING
    Publication number: 20190157012
    Abstract: Disclosed are methods and compositions for alternatingly adsorbing and desorbing sorbate molecules by changing the adsorption affinity of polarizable molecular sorbent molecules attached to surfaces of conductors, attached to dielectric materials between the conductors, or attached to both. The conductors and optionally a dielectric material can be arranged as a capacitor.
    Type: Application
    Filed: November 1, 2018
    Publication date: May 23, 2019
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Carlos A. Fernandez, Evgueni Polikarpov, Abhijeet J. Karkamkar, Gregory W. Coffey, Satish K. Nune, Phillip K. Koech, Bernard P. McGrail, John A. Roberts
  • Bulk-scaffolded hydrogen storage and releasing materials and methods for preparing and using same
    Patent number: 7963116
    Abstract: Compositions are disclosed for storing and releasing hydrogen and methods for preparing and using same. These hydrogen storage and releasing materials exhibit fast release rates at low release temperatures without unwanted side reactions, thus preserving desired levels of purity and enabling applications in combustion and fuel cell applications.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: June 21, 2011
    Assignee: Battelle Memorial Institute
    Inventors: S. Thomas Autrey, Abhijeet J. Karkamkar, Anna Gutowska, Liyu Li, Xiaohong S. Li, Yongsoon Shin
  • Process for synthesis of ammonia borane for bulk hydrogen storage
    Patent number: 7897129
    Abstract: The present invention discloses new methods for synthesizing ammonia borane (NH3BH3, or AB). Ammonium borohydride (NH4BH4) is formed from the reaction of borohydride salts and ammonium salts in liquid ammonia. Ammonium borohydride is decomposed in an ether-based solvent that yields AB at a near quantitative yield. The AB product shows promise as a chemical hydrogen storage material for fuel cell powered applications.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: March 1, 2011
    Assignee: Battelle Memorial Institute
    Inventors: S. Thomas Autrey, David J. Heldebrant, John C. Linehan, Abhijeet J. Karkamkar, Feng Zheng
  • Process and Composition for Controlling Foaming in Bulk Hydrogen Storage and Releasing Materials
    Publication number: 20090302269
    Abstract: New methods and compositions are disclosed that minimize foaming in hydrogen-releasing materials. Foaming can be minimized during release of hydrogen in composites that include structured forms such as wafers and discs. Change tolerances of from 0% to 25% in solid products described show promise for next-generation fuel elements and devices.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 10, 2009
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Daiwon Choi, Abhijeet J. Karkamkar, S. Thomas Autrey, Christopher L. Aardahl
  • Process for Synthesis of Ammonia Borane for Bulk Hydrogen Storage
    Publication number: 20090291039
    Abstract: The present invention discloses new methods for synthesizing ammonia borane (NH3BH3, or AB). Ammonium borohydride (NH4BH4) is formed from the reaction of borohydride salts and ammonium salts in liquid ammonia. Ammonium borohydride is decomposed in an ether-based solvent that yields AB at a near quantitative yield. The AB product shows promise as a chemical hydrogen storage material for fuel cell powered applications.
    Type: Application
    Filed: April 28, 2009
    Publication date: November 26, 2009
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: S. Thomas Autrey, David J. Heldebrant, John C. Linehan, Abhijeet J. Karkamkar, Feng Zheng
  • Bulk-Scaffolded Hydrogen Storage and Releasing Materials and Methods for Preparing and Using Same
    Publication number: 20090258215
    Abstract: Compositions are disclosed for storing and releasing hydrogen and methods for preparing and using same. These hydrogen storage and releasing materials exhibit fast release rates at low release temperatures without unwanted side reactions, thus preserving desired levels of purity and enabling applications in combustion and fuel cell applications.
    Type: Application
    Filed: May 4, 2009
    Publication date: October 15, 2009
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: S. Thomas Autrey, Abhijeet J. Karkamkar, Anna Gutowska, Liyu Li, Xiaohong S. Li, Yongsoon Shin