Patents by Inventor Elizabeth C. Kroll

Elizabeth C. Kroll 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 density magnetic recording compositions and processes thereof
    Patent number: 6451220
    Abstract: A magnetic composition comprised of cobalt ferrite nanoparticles dispersed in an ionic exchange resin.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: September 17, 2002
    Assignee: Xerox Corporation
    Inventors: Ronald F. Ziolo, Javier Tejada Palacios, Elizabeth C. Kroll, Xixiang Zhang, Rachel Pieczynski
  • High magnetization aqueous ferrofluids and processes for preparation and use thereof
    Patent number: 5667716
    Abstract: A ferrofluid comprising an aqueous suspension of an unsilanated or silanated nanocomposite comprised of Fe.sub.2 O.sub.3 nanoparticles and an ionic exchange resin, wherein the ferrofluid has a high magnetization moment of about 20 to about 40 emu/gram.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: September 16, 1997
    Assignee: Xerox Corporation
    Inventors: Ronald F. Ziolo, Elizabeth C. Kroll, Rachel Pieczynski
  • Magnetic refrigerant compositions and processes for making and using
    Patent number: 5641424
    Abstract: A magnetic process comprising: subjecting a magnetically susceptible media to a magnetic field wherein the fluid is magnetized and the magnetized media absorbs the heat of magnetization; transferring the absorbed heat from the magnetized fluid or solid to a heat sink; removing the magnetized magnetic media from the magnetic field, wherein the magnetic media undergoes spontaneous cooling to produce a cooled magnetic media; and providing heat to the cooled magnetic media from a heat source, and wherein said process is accomplished at above about 275 degrees Kelvin.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: June 24, 1997
    Assignee: Xerox Corporation
    Inventors: Ronald F. Ziolo, Elizabeth C. Kroll, Javier Tejada Palacios, Xixiang Zhang