Patents by Inventor Alexander J. Shapiro

Alexander J. Shapiro 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).

  • Doped GdGeSicompounds and methods for reducing hysteresis losses in GdGeSicompound
    Patent number: 8048236
    Abstract: A Gd5Ge2Si2 refrigerant compound is doped or alloyed with an effective amount of silicide-forming metal element such that the magnetic hysteresis losses in the doped Gd5Ge2Si2 compound are substantially reduced in comparison to the hysteresis losses of the undoped Gd5Ge2Si2 compound. The hysteresis losses can be nearly eliminated by doping the Gd5Ge2Si2 compound with iron, cobalt, manganese, copper, or gallium. The effective refrigeration capacities of the doped Gd5Ge2Si2 compound are significantly higher than for the undoped Gd5Ge2Si2 compound.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: November 1, 2011
    Assignee: The United States of America as represented by the Secretary of Commerce, the National Institute of Standards and Technology
    Inventors: Robert D. Shull, Alexander J. Shapiro, Virgil Provenzano
  • DOPED Gd5Ge2Si2 COMPOUNDS AND METHODS FOR REDUCING HYSTERESIS LOSSES IN Gd5Ge2Si2 COMPOUND
    Publication number: 20100044621
    Abstract: A Gd5Ge2Si2 refrigerant compound is doped or alloyed with an effective amount of silicide-forming metal element such that the magnetic hysteresis losses in the doped Gd5Ge2Si2 compound are substantially reduced in comparison to the hysteresis losses of the undoped Gd5Ge2Si2 compound. The hysteresis losses can be nearly eliminated by doping the Gd5Ge2Si2 compound with iron, cobalt, manganese, copper, or gallium. The effective refrigeration capacities of the doped Gd5Ge2Si2 compound are significantly higher than for the undoped Gd5Ge2Si2 compound.
    Type: Application
    Filed: October 26, 2009
    Publication date: February 25, 2010
    Inventors: Robert D. Shull, Alexander J. Shapiro, Virgil Provenzano
  • Doped GdGeSicompounds and methods for reducing hysteresis losses in GdGeSicompound
    Patent number: 7651574
    Abstract: A Gd5Ge2Si2 refrigerant compound is doped or alloyed with an effective amount of silicide-forming metal element such that the magnetic hysteresis losses in the doped Gd5Ge2Si2 compound are substantially reduced in comparison to the hysteresis losses of the undoped Gd5Ge2Si2 compound. The hysteresis losses can be nearly eliminated by doping the Gd5Ge2Si2 compound with iron, cobalt, manganese, copper, or gallium. The effective refrigeration capacities of the doped Gd5Ge2Si2 compound are significantly higher than for the undoped Gd5Ge2Si2 compound.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: January 26, 2010
    Assignee: The United States of America as represented by the Secretary of Commerce, the National Institute of Standards and Technology
    Inventors: Robert D. Shull, Alexander J. Shapiro, Virgil Provenzano