Patents by Inventor Kai-Kong Iu

Kai-Kong Iu 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: 20070076068
    Abstract: Compositions, systems, and methods for ink-jet printing having improved slewing decap time can comprise a pigment having an aryltricarboxyl group covalently attached thereto; at least 12 wt % of an anti-slewing decap cosolvent selected from the group consisting of 2-pyrrolidone, derivatized 2-pyrrolidone, and mixtures thereof; and a liquid vehicle.
    Type: Application
    Filed: May 19, 2006
    Publication date: April 5, 2007
    Inventors: Dennis Guo, Kai Kong Iu, Xiaohe Chen
  • 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
  • Publication number: 20060246383
    Abstract: An amphoteric stilbene composition is disclosed. The composition includes a fixing agent mixed with a predetermined amount of 4,4?-diamino-2,2?-stilbene disulfonic acid, biarylsulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, biaryldisulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, derivatives thereof, salts thereof, and/or mixtures thereof.
    Type: Application
    Filed: April 29, 2005
    Publication date: November 2, 2006
    Inventors: Kai-Kong Iu, Gary Larson, Hai Tran, William Houle
  • Publication number: 20050225618
    Abstract: Systems and methods for providing smudge resistant and durable ink-jet images are provided. Specifically, a system for printing durable ink-jet ink images can comprise a first printhead containing a fixer composition including a charged fixer component, wherein the first printhead is configured for ink-jet printing the fixer composition on a substrate. The system can further comprise a second printhead containing an ink-jet ink, wherein the second printhead is configured for ink-jet printing the ink-jet ink composition over the fixer composition. The ink-jet ink can also include a colorant carrying an opposite charge with respect to the charged fixer component. A third printhead containing a polymer overcoat composition can also be present, and can be configured for ink-jet printing the polymer overcoat composition over ink-jet ink composition. The polymer of the polymer overcoat composition can also carry an opposite charge with respect to the charged fixer component.
    Type: Application
    Filed: April 12, 2004
    Publication date: October 13, 2005
    Inventors: Ronald Askeland, Kai-Kong Iu, Dennis Parazak, Rodney Stramel
  • Patent number: 6830310
    Abstract: A cationic polymeric fixer material including cationic polymers and at least one marker composition soluble in the fixer material and detectable under either ultraviolet or near IR light; as well as a method of inkjet printing using said fixer material and a method of detecting cationic polymeric fixer material on a printed media using said fixer material.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: December 14, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kai Kong Iu, Yi-Hua Tsa
  • Publication number: 20040080557
    Abstract: A cationic polymeric fixer material comprising cationic polymers and at least one marker composition soluble in the fixer material and detectable under either ultraviolet or near IR light; as well as a method of inkjet printing using said fixer material and a method of detecting cationic polymeric fixer material on a printed media using said fixer material.
    Type: Application
    Filed: October 23, 2002
    Publication date: April 29, 2004
    Inventors: Kai Kong Iu, Yi-Hua Tsao
  • Patent number: 6648462
    Abstract: The present invention is drawn to ink-jet ink compositions, methods, and systems for increasing the bleed and smear fastness and optical density of a printed image. Specifically, an aqueous ink-jettable ink composition is disclosed which exhibits a decrease in pH upon exposure to radiation, followed by precipitation of the ink colorant. The composition can include an ink vehicle, an effective amount of an ink colorant having pH dependent solubility properties, and an effective amount of a photo-initiated acid generator. The method includes the steps of formulating the composition, jetting the ink composition from an ink-jet pen onto a substrate, and exposing the ink-jetted ink on the substrate to radiation wherein the ink-jet ink composition exhibits reduced pH, followed by precipitation of the colorant.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: November 18, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kai Kong Iu, Rodney D. Stramel
  • Publication number: 20030197768
    Abstract: The present invention is drawn to ink-jet ink compositions, methods, and systems for increasing the bleed and smear fastness and optical density of a printed image. Specifically, an aqueous ink-jettable ink composition is disclosed which exhibits a decrease in pH upon exposure to radiation, followed by precipitation of the ink colorant. The composition can comprise an ink vehicle, an effective amount of an ink colorant having pH dependent solubility properties, and an effective amount of a photo-initiated acid generator. The method comprises the steps of formulating the composition, jetting the ink composition from an ink-jet pen onto a substrate, and exposing the ink-jetted ink on the substrate to radiation wherein the ink-jet ink composition exhibits reduced pH, followed by precipitation of the colorant.
    Type: Application
    Filed: April 16, 2002
    Publication date: October 23, 2003
    Inventors: Kai Kong Iu, Rodney D. Stramel
  • Patent number: 6630017
    Abstract: An ink jet inkset is provided for image printers, in particular large format printers, for printing on both porous, non-porous, and hybrid glossy media. The inket contains a black ink and one or more color inks, said color ink composition comprises at least one water-soluble dye and a vehicle comprising at least one co-solvent and at least two different surfactants, a non-ionic surfactant and a fluoro-surfactant. The total surfactant concentration ranges from about 0.05 to 6 wt % of the ink composition. The non-ionic surfactant is present in a range of about 0.05 to 3 wt % of the ink composition, while the fluoro-surfactant is present in a range of about 0.001 to 3 wt % of the ink composition. The ink formulation that works well with porous, non-porous, and hybrid glossy media and provides substantially instant ink drying and light fastness of the ink. Further, the ink formulation evidences excellent image quality. The ink can also pass harsh pen material compatibility tests.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: October 7, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zeying Ma, Kai Kong Iu, Rodney D. Stramel, Shunqiong Yue
  • 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
  • Patent number: 6503308
    Abstract: The present invention provides black ink compositions for use in inkjet printing, which exhibit improved neutral color, light fastness, and gray scale properties. The black ink compositions generally include a mixture of two or more black dyes in balanced concentrations to obtain black ink having the improved properties while retaining good print-ability in an inkjet pen. In one aspect, a black ink composition may include a mixture of pacified Reactive Black 31 and Direct Black 168.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: January 7, 2003
    Assignee: Hewlett-Packard Company
    Inventors: Rodney D. Stramel, Kai Kong Iu
  • Publication number: 20020121219
    Abstract: The present invention provides black ink compositions for use in inkjet printing, which exhibit improved neutral color, light fastness, and gray scale properties. The black ink compositions generally include a mixture of two or more black dyes in balanced concentrations to obtain black ink having the improved properties while retaining good print-ability in an inkjet pen. In one aspect, a black ink composition may include a mixture of pacified Reactive Black 31 and Direct Black 168.
    Type: Application
    Filed: December 20, 2000
    Publication date: September 5, 2002
    Inventors: Rodney D. Stramel, Kai Kong Iu
  • Patent number: 6440535
    Abstract: A recording sheet is disclosed comprising a substrate, having on at least one side thereon, an ink absorbent layer, said ink absorbent layer comprising alumina sol, at least one gelling agent, at least one cyclodextrin compound, and optionally, at least one binder. The ink absorbent layer may further comprise at least one viscosity, modifying compound and at least one gloss enhancing compound. The recording sheet of the present invention provides enhanced lightfastness properties.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: August 27, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Kai-Kong Iu, Gary W. Byers
  • Patent number: 6436180
    Abstract: An ink jet ink composition is provided for large format printers for printing on both porous, non-porous, and hybrid glossy media. The ink composition comprises at least one water-soluble dye and a vehicle comprising at least one co-solvent and at least two different surfactants, a non-ionic surfactant and a fluoro-surfactant. The total surfactant concentration ranges from about 0.1 to 5 wt % of the ink composition. The non-ionic surfactant is present in a range of about 0.05 to 3 wt % of the ink composition, while the fluoro-surfactant is present in a range of about 0.001 to 3 wt % of the ink composition. The ink formulation that works well with porous, non-porous, and hybrid glossy media and provides substantially instant ink drying and light fastness of the ink. Further, the ink formulation evidences excellent image quality. The ink can also pass harsh pen material compatibility tests. The ink does not puddle on the surface of the orifice plate in the default pen, yet has low viscosity.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: August 20, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Zeying Ma, Rodney D. Stramel, Shunqiong Yue, Kai-Kong Iu, Hsin-Chieh Chou, Duane G. Canfield
  • Publication number: 20020022116
    Abstract: A recording sheet is disclosed comprising a substrate, having on at least one side thereon, and an ink absorbent layer, said ink absorbent layer comprising alumina sol, at least one gelling agent, at least one cyclodextrin compound, and optionally, at least one binder. The ink absorbent layer may further comprise at least one viscosity modifying compound and at least one gloss enhancing compound. The recording sheet of the present invention provides enhanced lightfastness properties.
    Type: Application
    Filed: February 23, 1998
    Publication date: February 21, 2002
    Inventors: KAI-KONG IU, GARY W. BYERS
  • Patent number: 6102998
    Abstract: Ink-jet inks and method of printing using the same are provided, the inks comprising at least one colorant and an aqueous vehicle, the vehicle comprising at least one anionic or nonionic surfactant, at least one alkoxylated polyhydroxy organic solvent, at least one water-miscible organic solvent; and optionally, at least one hydantoin compound, and optionally, at least one branched C.sub.2 -C.sub.7 alcohol. The inks enable production of near photographic images having little or no coalescence, excellent waterfastness, and reduced dry time, on a range of print media, in particular, photobase glossy paper.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: August 15, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Kai-Kong Iu, Leonard Slevin, William A. Houle
  • Patent number: 5909231
    Abstract: In a inkjet print cartridge ink flows from the reservoir around the edge of the silicon substrate before being ejected out of the nozzles. During operation, warm thermal boundary layers of ink form adjacent the substrate and dissolved gases in the thermal boundary layer of the ink form the bubbles. If the bubbles to grow larger than the diameter of subsequent ink passageways these bubbles choke the flow of ink to the vaporization chambers. This results in causing some of the nozzles of the printhead to become temporarily inoperable. The disclosure describes a method of avoiding such a malfunction in a liquid inkjet printing system by providing a method for reducing residual air bubbles in an inkjet print cartridge by flushing the empty cartridge by passing carbon dioxide through the fill port or the ink ejection nozzles prior to filling the print cartridge with ink and thereby eliminating residual air bubbles from the print cartridge when the print cartridge is filled with ink.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: June 1, 1999
    Assignee: Hewlett-Packard Co.
    Inventors: Winthrop D. Childers, Brian J. Keefe, Barbara Parcells, Frank Drogo, Shailendra Kumar, Steven L. Webb, Hanno Ix, Kai Kong Iu