Patents by Inventor Howard A. Doumaux

Howard A. Doumaux 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).

  • Publication number: 20100240826
    Abstract: Disclosed herein are pigment dispersions and inks formulated using the same; including at least one dispersed pigment, an aqueous carrier; and at least one block copolymer dispersant having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B); at least one block copolymer having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B);
    Type: Application
    Filed: May 28, 2010
    Publication date: September 23, 2010
    Inventors: Zeying Ma, Howard A. Doumaux, Sivapackia Ganapathiappan
  • Publication number: 20100222499
    Abstract: Disclosed herein are inks including an aqueous vehicle; at least one encapsulant-dispersed pigment; and at least one block copolymer binder dispersed throughout the aqueous vehicle and having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B);
    Type: Application
    Filed: May 11, 2010
    Publication date: September 2, 2010
    Inventors: Howard A. Doumaux, Zeying Ma, Sivapackia Ganapathiappan
  • Publication number: 20100222497
    Abstract: Disclosed herein are inks including an aqueous vehicle; at least one encapsulant-dispersed pigment; and at least one block copolymer binder dispersed throughout the aqueous vehicle and having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B);
    Type: Application
    Filed: May 11, 2010
    Publication date: September 2, 2010
    Inventors: Howard A. Doumaux, Zeying Ma, Sivapackia Ganapathiappan
  • Patent number: 7703909
    Abstract: An ink set for ink-jet printing includes a medium cyan ink-jet ink, a magenta ink-jet ink, and a gray ink-jet ink. Each of the medium cyan ink-jet ink, the magenta ink-jet ink, and the gray ink-jet ink are configured to have a lightness at a predetermined/given number of drops per unit area of an image-receiving medium such that the lightness of each of the inks are substantially matched.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: April 27, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Stephen W. Bauer, Howard A. Doumaux, Tienteh Chen
  • Patent number: 7533980
    Abstract: An ink set for ink-jet printing includes a medium cyan ink-jet ink, a magenta ink-jet ink, and a gray ink-jet ink. Each of the medium cyan ink-jet ink, the magenta ink-jet ink, and the gray ink-jet ink are configured to have a lightness at a predetermined/given number of drops per unit area of an image-receiving medium such that the lightness of each of the inks are substantially matched.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: May 19, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Stephen W. Bauer, Howard A. Doumaux, Tienteh Chen
  • Patent number: 7501016
    Abstract: A gray ink composition includes an ink vehicle having a black pigment and at least one color pigment dispersed therein. An anionic dispersant is: a) dispersed in the ink vehicle; b) associated with at least a portion of a surface of at least one of the dispersed black pigment or the at least one dispersed color pigment; and/or c) combinations thereof. At least one of the black pigment or the color pigment(s) has an anionic surfactant that is associated with at least another portion of the surface thereof.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: March 10, 2009
    Assignee: Hewlett-Packard Development Company, L.P
    Inventors: Shunqiong Yue, Howard A. Doumaux, Anne M. Kelly-Rowley
  • Patent number: 7479181
    Abstract: An inkjet ink composition consists essentially of a vehicle and an effective amount pigment red 168.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: January 20, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Howard A. Doumaux, Kathryn Nifong Burns, David M. Mahli
  • Patent number: 7476271
    Abstract: An inkjet ink set includes a red ink and an other ink. The red ink consists essentially of an ink vehicle and an effective amount of pigment red 168. The other ink includes an ink vehicle and an effective amount of at least one other pigment.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: January 13, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Howard A. Doumaux, David M. Mahli, Kathryn Nifong Burns
  • Patent number: 7459491
    Abstract: An inkjet ink including a polymer-attached pigment formulated to exhibit a compact configuration and an elongated configuration, which provides the polymer-attached pigment with a variable particle size. The polymer-attached pigment may include a pigment having at least one polymer attached to its surface. The at least one polymer may be formed from a hydrophobic segment and a hydrophilic segment, where the hydrophilic segment is soluble in an aqueous environment and the hydrophobic segment is insoluble in the aqueous environment. The polymer-attached pigment may be dispersed in an ink vehicle to provide a low viscosity inkjet ink. The inkjet ink may optionally include at least one binder formed from a hydrophobic segment and two hydrophilic segments. A method of producing a printed image having good durability and gloss is also disclosed.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: December 2, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Tyvoll, Howard A. Doumaux, Anne M. Kelly-Rowley, Sundar Vasudevan
  • Patent number: 7452415
    Abstract: Ink systems and combinations thereof that include neutral gray or black ink and at least one other pigment with matched light fastness are disclosed. Also disclosed are methods of printing.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: November 18, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Howard Doumaux, Katie Nifong Burns, David Mahli
  • Publication number: 20080274339
    Abstract: An ink set for ink-jet printing includes a medium cyan ink-jet ink, a magenta ink-jet ink, and a gray ink-jet ink. Each of the medium cyan ink-jet ink, the magenta ink-jet ink, and the gray ink-jet ink are configured to have a lightness at a predetermined/given number of drops per unit area of an image-receiving medium such that the lightness of each of the inks are substantially matched.
    Type: Application
    Filed: July 14, 2008
    Publication date: November 6, 2008
    Inventors: Stephen W. Bauer, Howard A. Doumaux, Tienteh Chen
  • Publication number: 20080194758
    Abstract: Disclosed herein are pigment dispersions and inks formulated using the same; including at least one dispersed pigment, an aqueous carrier; and at least one block copolymer dispersant having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B); at least one block copolymer having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B);
    Type: Application
    Filed: October 20, 2006
    Publication date: August 14, 2008
    Inventors: Zeying Ma, Howard A. Doumaux, Sivapackia Ganapathiappan
  • Publication number: 20080094457
    Abstract: Disclosed herein are inks including an aqueous vehicle; at least one encapsulant-dispersed pigment; and at least one block copolymer binder dispersed throughout the aqueous vehicle and having Structure I and comprising a hydrophobic block (A) and a hydrophilic block (B);
    Type: Application
    Filed: October 20, 2006
    Publication date: April 24, 2008
    Inventors: Howard A Doumaux, Zeying Ma, Sivapackia Ganapathiappan
  • Publication number: 20080022889
    Abstract: An inkjet ink composition consists essentially of a vehicle and an effective amount pigment red 168.
    Type: Application
    Filed: July 31, 2006
    Publication date: January 31, 2008
    Inventors: Howard A. Doumaux, Kathryn Nifong Burns, David M. Mahli
  • Publication number: 20080024575
    Abstract: An inkjet ink set includes eleven colored inks and a surface enhancing ink. The eleven colored inks include a magenta ink, a light magenta ink, a yellow ink, a cyan ink, a light cyan ink, a medium gray ink, a light gray ink, a photo black ink, a red ink, a green ink, and a blue ink. The surface enhancing ink is configured to enhance gloss of an image formed with at least one of the eleven colored inks.
    Type: Application
    Filed: July 31, 2006
    Publication date: January 31, 2008
    Inventors: Shunqiong Yue, Peter C. Morris, Anne M. Kelly-Rowley, Zeying Ma, David Mahli, Howard A. Doumaux, Gregg A. Lane, John M. Gardner
  • Publication number: 20080022890
    Abstract: An inkjet ink set includes a red ink and an other ink. The red ink consists essentially of an ink vehicle and an effective amount of pigment red 168. The other ink includes an ink vehicle and an effective amount of at least one other pigment.
    Type: Application
    Filed: July 31, 2006
    Publication date: January 31, 2008
    Inventors: Howard A. Doumaux, David M. Mahli, Kathryn Nifong Burns
  • Publication number: 20070292692
    Abstract: A gray ink composition includes an ink vehicle having a black pigment and at least one color pigment dispersed therein. An anionic dispersant is: a) dispersed in the ink vehicle; b) associated with at least a portion of a surface of at least one of the dispersed black pigment or the at least one dispersed color pigment; and/or c) combinations thereof. At least one of the black pigment or the color pigment(s) has an anionic surfactant that is associated with at least another portion of the surface thereof.
    Type: Application
    Filed: June 20, 2006
    Publication date: December 20, 2007
    Inventors: Shunqiong Yue, Howard A. Doumaux, Anne M. Kelly-Rowley
  • Publication number: 20070129463
    Abstract: Briefly described, embodiments of this disclosure include ink formulation and encapsulated pigments. One exemplary ink formulation includes an aqueous vehicle; a pigment dispersed throughout the aqueous vehicle, the pigment having styrene-acrylic copolymeric resins encapsulating the pigment; and at least one styrene-acrylic copolymeric binder dispersed throughout the aqueous vehicle.
    Type: Application
    Filed: December 5, 2005
    Publication date: June 7, 2007
    Inventors: Zeying Ma, Gregg Lane, John Gardner, Howard Doumaux, Anne Kelly-Rowley, Peter Morris, David Mahli, Shunqiong Yue
  • Publication number: 20070120926
    Abstract: Ink systems and combinations thereof that include neutral gray or black ink and at least one other pigment with matched light fastness are disclosed. Also disclosed are methods of printing.
    Type: Application
    Filed: November 30, 2005
    Publication date: May 31, 2007
    Inventors: Howard Doumaux, Kathryn Burns, David Mahli
  • Publication number: 20070076071
    Abstract: Compositions, systems, and methods for ink-jet printing having improved black to color bleed control, reduced wicking, and/or reduced halo are described. The composition can include a functionalized carbon pigment dispersed in an ink vehicle. The carbon pigment includes functional groups chemically attached thereto. Suitable functional groups includes an aromatic ring structure having multiple carboxyl groups (or salts thereof) attached to the aromatic ring structure, wherein at least two of the multiple carboxyl groups are positioned on adjacent carbon atoms of the aromatic ring structure.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 5, 2007
    Inventors: Kai-Kong Iu, Dennis Parazak, Dennis Guo, Xiaohe Chen, Rodney Stramel, Howard Doumaux