Patents by Inventor William R. Hutcheson

William R. Hutcheson 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).

  • Irregular shaped ferrite carrier for conductive magnetic brush development
    Publication number: 20030044711
    Abstract: A ferrite carrier for electrophotographic developers which comprises ferrite particles with irregular, non-spherical configuration capable of forming a conductive magnetic chain, said carrier having the general formula
    Type: Application
    Filed: August 22, 2002
    Publication date: March 6, 2003
    Applicant: Powdertech International Corp.
    Inventor: William R. Hutcheson
  • 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
  • Asphalt compounds and method for asphalt reconditioning using microwave radiation
    Patent number: 4849020
    Abstract: An improved asphalt composite utilizes a mixture of asphalt and a lossy microwave absorptive material normally in a granular form and dispersed homogeneously throughout the asphalt matrix. The use of a microwave material, particularly one having a Curie temperature in the range of about 100.degree. C., enhances removal, reconditioning and reforming the asphalt during patching or repair operations which rely upon microwave radiation heating.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: July 18, 1989
    Assignee: The Titan Corporation
    Inventors: Tracy L. Osborne, William R. Hutcheson