Patents by Inventor Charles G. Dupuy

Charles G. Dupuy 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).

  • Inkjet ink formulation
    Patent number: 7105045
    Abstract: An inkjet ink includes a mixture of a phthalocyanine dye and a rhodamine magenta dye in an ink vehicle, wherein the inkjet ink has a chroma C* value of approximately 60 to approximately 90.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: September 12, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexey S Kabalnov, Jay S Gondek, Charles G. Dupuy
  • Magneta ink-jet inks
    Patent number: 6997978
    Abstract: The present invention is drawn to magenta dye blends and magenta ink-jet inks that can be used in ink sets for creating photo quality images. The dye blend can comprise a nickel-containing azo dye blended with a rhodamine dye at a 1:80 to 125:4 weight ratio.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: February 14, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexey S Kabalnov, Charles G. Dupuy, Patricia A Wang
  • Dye sets and ink sets for ink-jet ink imaging
    Patent number: 6991676
    Abstract: The present invention is drawn to dye sets for formulating ink-jet ink sets, and to specific ink sets. The dye set can comprise cyan colorant including a phthalocyanine dye; magenta colorant including a copper- or nickel-containing azo dye; and yellow colorant including at least one of Yellow 1189 dye and Yellow 104 dye yellow colorant having the structure Formula 1: wherein R1 is H, SO3M, COOM, or SO2NH2; and wherein R2 is H, SO3M, COOM, or SO2NH2; and wherein R3 is H or CH3; and wherein n and m are 2, 3, 4, 5 or 6; and wherein M is H, Na, Li, K, ammonium, ammonium substituted with alkyl or combinations thereof. Optionally, a cyan triarylmethine dye such as Acid Blue 9, or another similar cyan dye, can be blended with the phthalocyanine dye; a rhodamine dye can be blended with the copper- or nickel-containing azo dye; and/or Acid Yellow 17 or Acid Yellow 23 can be blended with Formula 1.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: January 31, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexey S Kabalnov, Charles G. Dupuy, Luanne J. Rolly, Naomi Oak, Patricia A Wang
  • Ink-jet inks and ink sets providing excellent gamut, image quality, and permanence
    Patent number: 6673140
    Abstract: The present invention is drawn to ink-jet inks that can be used with cyan, magenta, and yellow ink set systems for improved image gamut and lightfastness while maintaining good chroma in the case of color ink and lightness in the case of black ink. More specifically, in an embodiment of the invention, ink sets can comprise specific ink-jet inks having low dye load dyes for use in six-ink systems, for example.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: January 6, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Paul Tyrell, Patricia A Wang, Charles G. Dupuy
  • Ink-jet inks and ink sets providing excellent gamut, image quality, and permanence
    Publication number: 20030172839
    Abstract: The present invention is drawn to ink-jet inks that can be used with cyan, magenta, and yellow ink set systems for improved image gamut and lightfastness while maintaining good chroma in the case of color ink and lightness in the case of black ink. More specifically, in an embodiment of the invention, ink sets can comprise specific ink-jet inks having low dye load dyes for use in six-ink systems, for example.
    Type: Application
    Filed: March 11, 2002
    Publication date: September 18, 2003
    Inventors: Paul Tyrell, Patricia A. Wang, Charles G. Dupuy