Patents by Inventor Dennis Guo

Dennis Guo 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).

  • Patent number: 11972937
    Abstract: A filament assembly for mounting to a source assembly of a mass spectrometer, the filament assembly comprising a body having one of: an aperture to receive a corresponding spigot provided by a source assembly; or a spigot to be received in a corresponding aperture on a source assembly.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: April 30, 2024
    Assignee: Micromass UK Limited
    Inventors: Alastair Booth, Alvin Chua, Carl Chen, Marcus Dawber, Enchen Guo, Dennis Ong, Richard Tyldesley-Worster
  • Publication number: 20240089639
    Abstract: A global shutter image sensor with improved pixel failure coverage detects failures caused by the pixel chip of the image sensor. The global shutter image sensor includes a pixel chip including an array of photodiodes and associated logic, and a logic chip, bonded to the pixel chip, including an array of logic blocks for processing the images detected by the photodiodes. A failure detection circuit coupled to a reference voltage node of the image sensor detects a failure in the pixel chip by capturing a first level of pixel bias current and a second level of pixel bias current wherein a difference between the first level and the second level drives an output of the failure detection circuit either as logic high or as logic low.
    Type: Application
    Filed: September 8, 2022
    Publication date: March 14, 2024
    Inventors: Liang ZUO, Zhenfu TIAN, Jiayu GUO, Dennis LEE, Zhiqiang SONG
  • Patent number: 11155726
    Abstract: Inkjet inks are described herein. In an example, an inkjet ink can comprise: at least one colorant; at least one solvent comprising glycerol in an amount of from about 1 wt % to about 20 wt % based on the total weight of the inkjet ink; water; and at least one binder, wherein the binder comprises a polyurethane-based binder dispersion.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: October 26, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Benjamin Abelovski, Ryan Vu, Jie Zheng, Dennis Guo, George Sarkisian, Tienteh Chen
  • Patent number: 11136466
    Abstract: Yellow inkjet inks are disclosed. In an example, an inkjet ink composition comprises: at least one colorant comprising at least one yellow pigment; at least one solvent comprising at least one triol; water; and at least one binder. The binder comprises a polyurethane-based binder dispersion, which comprises water and a polyurethane. The polyurethane comprises: (A) a polyisocyanate, (B) a first polyol having a chain with two hydroxyl functional groups at one end of the chain and no hydroxyl groups at an opposed end of the chain, (C) a second polyol having a chain with two hydroxyl functional groups at both ends of the chain, (D) a carboxylic acid functional group with two hydroxyl functional groups, and (E) a sulfonate or sulfonic acid functional group having two amino functional groups.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: October 5, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dennis Guo, Jie Zheng, Tienteh Chen, Jun Yang, Marcos A. Barreto Caban
  • Publication number: 20190367756
    Abstract: Inkjet inks are described herein. In an example, an inkjet ink can comprise: at least one colorant; at least one solvent comprising glycerol in an amount of from about 1 wt % to about 20 wt % based on the total weight of the inkjet ink; water; and at least one binder, wherein the binder comprises a polyurethane-based binder dispersion.
    Type: Application
    Filed: March 27, 2017
    Publication date: December 5, 2019
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Benjamin ABELOVSKI, Ryan VU, Jie ZHENG, Dennis GUO, George SARKISIAN, Tienteh CHEN
  • Publication number: 20190322887
    Abstract: Yellow inkjet inks are disclosed. In an example, an inkjet ink composition comprises: at least one colorant comprising at least one yellow pigment; at least one solvent comprising at least one triol; water; and at least one binder. The binder comprises a polyurethane-based binder dispersion, which comprises water and a polyurethane. The polyurethane comprises: (A) a polyisocyanate, (B) a first polyol having a chain with two hydroxyl functional groups at one end of the chain and no hydroxyl groups at an opposed end of the chain, (C) a second polyol having a chain with two hydroxyl functional groups at both ends of the chain, (D) a carboxylic acid functional group with two hydroxyl functional groups, and (E) a sulfonate or sulfonic acid functional group having two amino functional groups.
    Type: Application
    Filed: February 27, 2017
    Publication date: October 24, 2019
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Dennis GUO, Jie ZHENG, Tienteh CHEN, Jun YANG, Marcos A. Barreto CABAN
  • Patent number: 9382437
    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: Grant
    Filed: May 19, 2006
    Date of Patent: July 5, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dennis Guo, Kai Kong Iu, Xiaohe Chen
  • Patent number: 8268064
    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: Grant
    Filed: September 28, 2006
    Date of Patent: September 18, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kai-Kong Iu, Dennis P Parazak, Dennis Guo, Xiaohe Chen, Rodney Stramel, Howard A. Doumaux
  • Patent number: 7501017
    Abstract: Compositions, systems, and methods of printing an ink-jet image are provided. The composition can be an ink-jet ink, comprising a liquid vehicle; from 0.5 wt % to 10 wt % of a polymer-dispersed pigment; and from 0.5 wt % to 10 wt % of a self-dispersed pigment selected from the group consisting of a second polymer-dispersed pigment and a small molecule-dispersed pigment.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: March 10, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: George Sarkisian, Xiaohe Chen, Dennis Guo, Jodi Bates
  • Publication number: 20070085887
    Abstract: Self-dispersed pigment ink formulations and systems employing the same are disclosed.
    Type: Application
    Filed: October 18, 2005
    Publication date: April 19, 2007
    Inventors: Kai-Kong Iu, Rodney Stramel, Dennis Guo
  • 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: 20060084721
    Abstract: Compositions, systems, and methods of printing an ink-jet image are provided. The composition can be an ink-jet ink, comprising a liquid vehicle; from 0.5 wt % to 10 wt % of a polymer-dispersed pigment; and from 0.5 wt % to 10 wt % of a self-dispersed pigment selected from the group consisting of a second polymer-dispersed pigment and a small molecule-dispersed pigment.
    Type: Application
    Filed: March 1, 2005
    Publication date: April 20, 2006
    Inventors: George Sarkisian, Xiaohe Chen, Dennis Guo, Jodi Bates
  • Publication number: 20050206703
    Abstract: An ink-jet ink composition includes a jettable vehicle, a plurality of pigment solids dispersed in the jettable vehicle, and a half-ester of styrene maleic anhydride (SMA) dispersed in the jettable vehicle.
    Type: Application
    Filed: March 14, 2005
    Publication date: September 22, 2005
    Inventors: Dennis Guo, Xiaohe Chen