Patents by Inventor Darryl S. Williams

Darryl S. Williams 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).

  • Metallic dispersions for inkjet printing
    Patent number: 8764895
    Abstract: A dispersion of silver particles and a method of making the dispersion and ink are described. The dispersion or ink may be an aqueous dispersion or ink and may produce silver images having improved properties such as an improvement in gloss.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: July 1, 2014
    Assignee: Cabot Corporation
    Inventors: Gregory M. Berube, Darryl S. Williams, Alexander I. Shakhnovich
  • Metallic Dispersions for Inkjet Printing
    Publication number: 20120105559
    Abstract: A dispersion of silver particles and a method of making the dispersion and ink are described. The dispersion or ink may be an aqueous dispersion or ink and may produce silver images having improved properties such as an improvement in gloss.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: Cabot Corporation
    Inventors: Gregory M. Berube, Darryl S. Williams, Alexander I. Shakhnovich
  • Inkjet Ink Compositions Comprising Polymeric Dispersants Having Attached Chromophore Groups
    Publication number: 20110207860
    Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric group and at least one group having the formula -A?-(B)y(C)z, wherein A and A? are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.
    Type: Application
    Filed: May 5, 2011
    Publication date: August 25, 2011
    Applicant: Cabot Corporation
    Inventors: Alexander I. Shakhnovich, Darryl S. Williams, Joseph B. Carroll
  • Inkjet ink compositions comprising polymeric dispersants having attached chromophore groups
    Patent number: 7947761
    Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric group and at least one group having the formula -A?-(B)y(C)z, wherein A and A? are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: May 24, 2011
    Assignee: Cabot Corporation
    Inventors: Alexander I. Shakhnovich, Darryl S. Williams, Joseph B. Carroll
  • Luminescent compositions, methods for making luminescent compositions and inks incorporating the same
    Patent number: 7922936
    Abstract: A particulate luminescent composition is disclosed that, when excited by electromagnetic radiation at a first frequency, emits electromagnetic radiation at a second frequency equal to or within 1500 cm?1 of the first frequency. The luminescent composition comprises substantially spherical particles having a weight average particle size of less than about 10 ?m and a particle size distribution such that at least about 90 weight percent of the particles are not larger than twice the average particle size.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: April 12, 2011
    Assignee: Cabot Corporation
    Inventors: Mark J. Hampden-Smith, Liam Noailles, Richard Anthony Einhorn, Darryl S. Williams
  • LUMINESCENT COMPOSITIONS, METHODS FOR MAKING LUMINESCENT COMPOSITIONS AND INKS INCORPORATING THE SAME
    Publication number: 20100084852
    Abstract: A particulate luminescent composition is disclosed that, when excited by electromagnetic radiation at a first frequency, emits electromagnetic radiation at a second frequency equal to or within 1500 cm?1 of the first frequency. The luminescent composition comprises substantially spherical particles having a weight average particle size of less than about 10 ?m and a particle size distribution such that at least about 90 weight percent of the particles are not larger than twice the average particle size.
    Type: Application
    Filed: December 8, 2009
    Publication date: April 8, 2010
    Applicant: CABOT CORPORATION
    Inventors: Mark J. Hampden-Smith, Liam Noailles, Richard Anthony Einhorn, Darryl S. Williams
  • Inkjet ink compositions comprising polymeric dispersants having attached chromophore groups
    Publication number: 20070179213
    Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric group and at least one group having the formula -A?-(B)y(C)z, wherein A and A? are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.
    Type: Application
    Filed: January 31, 2007
    Publication date: August 2, 2007
    Inventors: Alexander I. Shakhnovich, Darryl S. Williams, Joseph B. Carroll
  • Inkjet ink compositions comprising polymeric dispersants having attached chromophore groups
    Publication number: 20070179215
    Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric group and at least one group having the formula -A?-(B)y(C)z, wherein A and A? are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.
    Type: Application
    Filed: January 31, 2007
    Publication date: August 2, 2007
    Inventors: Alexander I. Shakhnovich, Darryl S. Williams, Joseph B. Carroll
  • Inkjet ink compositions comprising polymeric dispersants having attached chromophore groups
    Publication number: 20070179214
    Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric group and at least one group having the formula -A?-(B)y(C)z, wherein A and A? are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.
    Type: Application
    Filed: January 31, 2007
    Publication date: August 2, 2007
    Inventors: Alexander I. Shakhnovich, Darryl S. Williams, Joseph B. Carroll