Patents Assigned to PowderTech Corporation
  • Environmentally benign high conductivity ferrite carrier with widely variable magnetic moment
    Patent number: 6294304
    Abstract: A ferrite carrier includes manganese oxide, ferric oxide and minor amounts of titanium dioxide and provides an environmentally benign, highly conductive, reprographic carrier powder.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: September 25, 2001
    Assignee: PowderTech Corporation
    Inventors: Alan Sukovich, William R. Hutcheson
  • Non-stoichiometric lithium ferrite carrier
    Patent number: 5798198
    Abstract: A non-stoichiometric lithium ferrite powder having a compositional range represented by the formula:?(Li.sub.2 O).sub.0.25 (Fe.sub.2 O.sub.3).sub.0.25 !.sub.x (Fe.sub.2 O.sub.3).sub.1.00-xwhere 0.35<x.ltoreq.0.50 mole fraction provides an environmentally safe carrier.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: August 25, 1998
    Assignee: Powdertech Corporation
    Inventors: Alan Sukovich, William R. Hutcheson