Patents by Inventor Richard N. Muller

Richard N. Muller 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).

  • Insulative magnetic brush developer compositions
    Patent number: 5516614
    Abstract: An insulating developer composition comprised of resin particles, pigment particles, wax component particles, compatibilizer, and a surface additive mixture comprised of metal salts of fatty acids, silica particles, and metal oxide particles; and carrier particles comprised of a ferrite core with a polymer coating or mixture of polymer coatings; and wherein said developer is of a conductivity of from about 10.sup.-14 to about 10.sup.-16 (ohm-cm).sup.-1.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: May 14, 1996
    Assignee: Xerox Corporation
    Inventors: Robert J. Nash, Cheryl A. Hanzlik, Richard N. Muller, Richard J. Hodgson
  • Conductive developer compositions with surface additives
    Patent number: 5510220
    Abstract: A developer composition comprised of negatively charged toner particles comprised of crosslinked polyester resin particles, pigment particles, and a surface additive mixture comprised of metal salts of fatty acids in an amount of from about 0.2 to about 0.5 weight percent, metal oxide particles in an amount of from about 0.3 to about 1 weight percent, and silica particles in an amount of from about 0.2 to about 0.5 weight percent; and carrier particles comprised of a core with a coating thereover containing a conductive component.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: April 23, 1996
    Assignee: Xerox Corporation
    Inventors: Robert J. Nash, Cheryl A. Hanzlik, Richard N. Muller, Richard J. Hodgson
  • Conductive developer compositions with wax and compatibilizer
    Patent number: 5506083
    Abstract: A developer composition comprised of a negatively charged toner composition comprised of crosslinked polyester resin particles, pigment particles, wax component particles, a compatibilizer and a surface additive mixture comprised of metal salts of fatty acids, silica particles and metal oxide particles; and carrier particles comprised of a core with a polymer coating or mixture of polymer coatings; and wherein said coating or coatings contain a conductive component.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: April 9, 1996
    Assignee: Xerox Corporation
    Inventors: Robert J. Nash, Cheryl A. Hanzlik, Richard N. Muller, Richard J. Hodgson