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: 20060181587
    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: February 15, 2005
    Publication date: August 17, 2006
    Inventors: Stephen Bauer, Howard Doumaux, Tienteh Chen
  • Publication number: 20060084720
    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: Application
    Filed: February 28, 2005
    Publication date: April 20, 2006
    Inventors: David Tyvoll, Howard Doumaux, Anne Kelly-Rowley, Sundar Vasudevan
  • Patent number: 6830326
    Abstract: In a four pen ink jet printer comprising cyan, yellow, magenta, and black inks, a clear liquid is applied to printed ink on a print medium via a fifth pen, thereby fixing the colorants, which in turn improves the durability of the printed ink. The clear fixer fluid comprises at least one organic acid and, optionally, a salt of at least one polymeric acid.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: December 14, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Yi-Hua Tsao, Howard A. Doumaux
  • Patent number: 6780208
    Abstract: A battery is made by drop on demand printing a first electrode pattern and a second electrode pattern, and applying an electrolyte region over a portion of the first electrode pattern and a portion of the second electrode pattern.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: August 24, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Glen A. Hopkins, Winthrop D. Childers, Howard A. Doumaux
  • Publication number: 20040001998
    Abstract: A battery is made by drop on demand printing a first electrode pattern and a second electrode pattern, and applying an electrolyte region over a portion of the first electrode pattern and a portion of the second electrode pattern.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventors: Glen A. Hopkins, Winthrop D. Childers, Howard A. Doumaux
  • Patent number: 6610129
    Abstract: An ink-jet ink composition and a method of printing with the ink composition comprising at least one colorant and an aqueous vehicle comprising at least one refractory or noble metal-reactive component.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: August 26, 2003
    Assignee: Hewlett-Packard Development Company
    Inventors: Richard A Sader, Paul J. Bruinsma, Amiya K Chatterjee, Howard A Doumaux, Noah C. Lassar, Matthew D Giere
  • Patent number: 6607589
    Abstract: An aqueous inkjet ink and an ink set using such ink, the ink comprising as colorant, a Copper Phthalocyanine (CuPc) dye compound having formula II: wherein (x,y,z)=4.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: August 19, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Raymond J Adamic, Richard A Sader, Gary W Byers, Paul J. Bruinsma, Howard A. Doumaux, Kai Kong Iu, Richard Anderson, Hiang P Lauw
  • Publication number: 20030127019
    Abstract: An aqueous inkjet ink and an inkset using such ink, the ink comprising as colorant, a Copper Phthalocyanine (CuPc) dye compound having formula II: 1
    Type: Application
    Filed: April 17, 2001
    Publication date: July 10, 2003
    Inventors: Raymond J. Adamic, Richard A. Sader, Gary W. Byers, Paul J. Bruinsma, Howard A. Doumaux, Kai Kong Iu, Richard Anderson, Hiang P. Lauw
  • Publication number: 20030092796
    Abstract: In a four pen ink jet printer comprising cyan, yellow, magenta, and black inks, a clear liquid is applied to printed ink on a print medium via a fifth pen, thereby fixing the colorants, which in turn improves the durability of the printed ink. The clear fixer fluid comprises at least one organic acid and, optionally, a salt of at least one polymeric acid.
    Type: Application
    Filed: October 23, 2002
    Publication date: May 15, 2003
    Inventors: Yi-Hua Tsao, Howard A. Doumaux
  • Patent number: 6503978
    Abstract: In a four pen ink jet printer comprising cyan, yellow, magenta, and black inks, a clear liquid is applied to printed ink on a print medium via a fifth pen, thereby fixing. the colorants, which in turn improves the durability of the printed ink. The clear fixer fluid comprises at least one organic acid and, optionally, a salt of at least one polymeric acid.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: January 7, 2003
    Assignee: Hewlett-Packard Company
    Inventors: Yi-Hua Tsao, Howard A. Doumaux
  • Patent number: 6461418
    Abstract: The present invention is directed to aqueous based ink compositions for ink jet printing on offset media and offset ink comprising various combinations of nonionic surfactants. Such formulations include effective amounts of an ink colorant and a nonionic surfactant having an HLB value from about 4 to 14. Optionally, additional nonionic surfactants, solvents, and binders can be added. In another formulation, an effective amount of an ink colorant, at least two nonionic surfactants, each being present at from about 0.01% to 10% by weight (preferably 0.01% to 2% by weight) and an effective amount of at least one binder (such as an acrylate binder) is disclosed.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: October 8, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Shunqiong Yue, George M. Sarkisian, Mark L. Choy, Yi-Hua Tsao, Howard A Doumaux
  • Patent number: 6412935
    Abstract: A method of applying a fixer fluid overcoat to a porous or semi-porous medium printed in an ink jet printer is provided. The method includes: (a) providing at least one ink including a colorant and contained in at least one ink-printing pen maintained within the ink jet printer; (b) providing the fixer fluid in a fixer fluid pen maintained within the ink jet printer; (c) printing the ink(s) on the print medium; and (d) overprinting the ink(s) with the fixer fluid by advancing the print medium a few dot rows per print swath and either (i) applying the fixer fluid to the ink(s) on an Nth pass where the fixer fluid pen trails the ink-printing pen(s), or (ii) printing an additional swath without an advance of the print medium with the fixer fluid where the fixer fluid pen leads the ink-printing pen(s).
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: July 2, 2002
    Assignee: Hewlett-Packard Company
    Inventor: Howard A. Doumaux
  • Patent number: 5912220
    Abstract: Disclosed herein are surfactant complexes and methods for using them. The complexes contain nonionic surfactants in low concentrations. The surfactants are complexes with associative polymeric thickeners. These complexes can be formulated for use as laundry pre-spotters, hard surface cleaners, and insecticides. They can also be used in other applications.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: June 15, 1999
    Assignee: S. C. Johnson & Son, Inc.
    Inventors: John A. Sramek, Howard A. Doumaux, Teeradetch Tungsubutra, Peter J. Schroeder