Patents by Inventor Richard J. Hodgson

Richard J. Hodgson 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).

  • Protein compatible methods and compounds for controlling the morphology and shrinkage of silica derived from polyol-modified silanes
    Patent number: 7375168
    Abstract: Siliceous materials were prepared by adding one or more additives, including one or more water soluble polymers, and derivatives thereof, as well as trifunctional silanes, to sols containing tetraalkoxysilanes derived from polyols. The polymers facilitate phase separation of the growing silica gel matrix, leading to high surface area self-supporting silica gels with cure occurring at ambient temperatures. The materials also show a significant reduction in shrinkage properties and significant protein stabilization abilities.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: May 20, 2008
    Assignee: McMaster University
    Inventors: Zheng Zhang, Yang Chen, Jorge Cruz-Aguado, Richard J. Hodgson, Dina Tleugabulova, John D. Brennan, Michael A. Brook
  • Protein compatible methods and compounds for controlling the morphology and shrinkage of silica derived from polyol-modified silanes
    Publication number: 20040249082
    Abstract: Siliceous materials were prepared by adding one or more additives, including one or more water soluble polymers, and derivatives thereof, as well as trifunctional silanes, to sols containing tetraalkoxysilanes derived from polyols. The polymers facilitate phase separation of the growing silica gel matrix, leading to high surface area self-supporting silica gels with cure occurring at ambient temperatures. The materials also show a significant reduction in shrinkage properties and significant protein stabilization abilities.
    Type: Application
    Filed: April 1, 2004
    Publication date: December 9, 2004
    Applicant: McMaster University
    Inventors: Zheng Zhang, Yang Chen, Jorge Cruz-Aguado, Richard J. Hodgson, Dina Tleugabulova, John D. Brennan, Michael A. Brook
  • Delayed acid for gel breaking
    Patent number: 5813466
    Abstract: A crosslinked water-based gel, for example a gel plug in an underground rock formation or a pipeline, is broken by an enzyme and a substrate which is capable of being converted by the enzyme into an organic acid which breaks down the gel. The enzyme is allowed to catalyze the conversion of the substrate into the acid to cause the breakdown of the gel.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: September 29, 1998
    Assignee: Cleansorb Limited
    Inventors: Ralph E. Harris, Richard J. Hodgson
  • Method of using scavengeless developer compositions
    Patent number: 5670289
    Abstract: A method of imaging which comprises formulating an electrostatic latent image on an imaging member, affecting development thereof with a toner composition comprised of resin particles, and pigment particles, and which composition includes thereon a surface additive mixture of silica, or titanium dioxide, metal salts of fatty acids, and an aluminum complex, and thereafter transferring the developed image to a suitable substrate.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: September 23, 1997
    Assignee: Xerox Corporation
    Inventors: Cheryl A. Hanzlik, Richard J. Hodgson, Alexander J. Fioravanti
  • 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
  • Developer compositions with carrier particles comprising polymeric alcohol waxes
    Patent number: 5194357
    Abstract: A developer comprised of a toner composition comprised of resin particles and pigment particles, and carrier particles comprised of a core with a coating comprised of a wax component, or a polymeric alcohol of the formulaCH.sub.3 (CH.sub.2).sub.n CH.sub.2 OHwherein n is a number of from about 30 to about 300.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: March 16, 1993
    Assignee: Xerox Corporation
    Inventor: Richard J. Hodgson