Patents by Inventor Shigang Qiu

Shigang Qiu 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: 10162279
    Abstract: Provided is an emulsion that includes a water phase and a resin containing phase. The emulsion is prepared from a mixture comprising water, a surfactant, a resin that includes an acidic moiety, and an organic compound having at least two different moieties. Each of the two moieties have a single functionality or dual functionality. The single functionality and the dual functionality are selected from a capability to neutralize the acidic moiety of the resin, a capability to form a hydrogen bond, or both.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: December 25, 2018
    Assignee: XEROX CORPORATION
    Inventors: Shigang Qiu, Kathryne S. Brockman, Michael J. D'Amato, Frank Ping Hay Lee
  • Patent number: 9890284
    Abstract: Disclosed herein are formulations and processes for the preparation of pigment and wax dual dispersions by (1) providing a solution comprising a water and at least one surfactant in a dispersion apparatus comprising a container, a rotor-stator homogenizer, and a piston homogenizer coupled via a recirculation device; (2) adding at least one pigment to the solution; (3) forming a pigment dispersion by flowing the at least one pigment and the solution to the rotor-stator homogenizer via the recirculation device; (4) adding at least one wax to the pigment dispersion; and (5) flowing the at least one wax and pigment dispersion to the piston homogenizer via the recirculation device until a pigment and wax dual dispersion is formed. Also disclosed herein are pigment and wax dual dispersions, as well as a dispersion apparatus for preparing pigment and wax dual dispersions.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: February 13, 2018
    Assignee: XEROX CORPORATION
    Inventors: Shigang Qiu, Michael D'Amato, Frank Ping Hay Lee
  • Publication number: 20180031987
    Abstract: Provided is an emulsion that includes a water phase and a resin containing phase. The emulsion is prepared from a mixture comprising water, a surfactant, a resin that includes an acidic moiety, and an organic compound having at least two different moieties. Each of the two moieties have a single functionality or dual functionality. The single functionality and the dual functionality are selected from a capability to neutralize the acidic moiety of the resin, a capability to form a hydrogen bond, or both.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 1, 2018
    Inventors: Shigang Qiu, Kathryne S. Brockman, Michael J. D'Amato, Frank Ping Hay Lee
  • Patent number: 9464173
    Abstract: A process for making a latex by phase inversion emulsification in an agitated reactor column is described.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: October 11, 2016
    Assignee: Xerox Corporation
    Inventors: Shigang Qiu, David J W Lawton, Chieh-min Cheng
  • Publication number: 20160246191
    Abstract: The disclosure provides robust phase inversion emulsification (PIE) processes, which produces polyester latex particles having particle size distributions with high centering capability indexes (Cpk), for the preparation of toners of good quality.
    Type: Application
    Filed: April 29, 2016
    Publication date: August 25, 2016
    Inventors: Shigeng Li, Shigang Qiu, Peter Van Nguyen, Amy Avolia Grillo, Chieh-Min Cheng
  • Patent number: 9410037
    Abstract: A process for making a crystalline latex suitable for use in a toner by phase inversion emulsification (PIE) where the liquid reagents, such as, organic solvent(s), neutralizing agent and water, are reused from a prior PIE.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: August 9, 2016
    Assignee: Xerox Corporation
    Inventors: Shigeng Li, Yanjia Zuo, Shigang Qiu, Peter V Nguyen, Chieh-Min Cheng
  • Publication number: 20160168337
    Abstract: A process for making a latex by phase inversion emulsification in an agitated reactor column is described.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 16, 2016
    Inventors: Shigang Qiu, David JW Lawton, Chieh-min Cheng
  • Patent number: 9366979
    Abstract: The disclosure provides robust phase inversion emulsification (PIE) processes, which produces polyester latex particles having particle size distributions with high centering capability indexes (Cpk), for the preparation of toners of good quality.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: June 14, 2016
    Assignee: XEROX CORPORATION
    Inventors: Shigeng Li, Shigang Qiu, Peter Van Nguyen, Amy Avolia Grillo, Chieh-Min Cheng
  • Publication number: 20160160046
    Abstract: A process for making a crystalline latex suitable for use in a toner by phase inversion emulsification (PIE) where the liquid reagents, such as, organic solvent(s), neutralizing agent and water, are reused from a prior PIE.
    Type: Application
    Filed: December 5, 2014
    Publication date: June 9, 2016
    Inventors: Shigeng Li, Yanjia Zuo, Shigang Qiu, Peter V. Nguyen, Chieh-Min Cheng
  • Patent number: 9354531
    Abstract: A process for making a latex emulsion where distillation occurs at an elevated temperature is used to make resin particles with a conditioned surface which can be used to make magenta toner with increased efficiency.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: May 31, 2016
    Assignee: XEROX CORPORATION
    Inventors: Shigeng Li, Christopher M Wolfe, Randy P Tin, Eric Godshall, Shigang Qiu, Peter V Nguyen, Jay L Schneider, Linda S Schriever, Steven M Malachowski, Amy A Grillo, Chieh-Min Cheng
  • Patent number: 9348248
    Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: May 24, 2016
    Assignee: Xerox Corporation
    Inventors: Shigang Qiu, Richard P N Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
  • Patent number: 9285693
    Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: March 15, 2016
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Patent number: 9267032
    Abstract: A process for making a crystalline latex emulsion suitable for use in toner using phase invention emulsification (PIE) where solvent is reused is presented.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: February 23, 2016
    Assignee: Xerox Corporation
    Inventors: Shigeng Li, Yanjia Zuo, Shigang Qiu, Peter V Nguyen, Amy A Grillo, Steven M Malachowski, Chieh-Min Cheng
  • Publication number: 20160004175
    Abstract: A process for making a latex emulsion where distillation occurs at an elevated temperature is used to make resin particles with a conditioned surface which can be used to make magenta toner with increased efficiency.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 7, 2016
    Inventors: Shigeng Li, Christopher M. Wolfe, Randy P Tin, Eric Godshall, Shigang Qiu, Peter V Nguyen, Jay L Schneider, Linda S Schriever, Steven M Malachowski, Amy A Grillo, Chieh-Min Cheng
  • Patent number: 9223236
    Abstract: The present disclosure provides processes for making inorganic or organic colorant dispersions using an acoustic mixer, where such dispersion may be used to make toner. Such processes apply low frequency, high intensity acoustic energy and a consistent shear field throughout an entire mixing vessel and provide uniform dispersion of colorants within minutes.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: December 29, 2015
    Assignee: Xerox Corporation
    Inventors: Shigang Qiu, Santiago Faucher, Kimberly D Nosella, David R Kurceba, Yulin Wang, Karina Lopez
  • Patent number: 9223238
    Abstract: A process is disclosed for making a resin emulsion suitable for use in forming toner particles including using a wiped film evaporator for removing residual solvents.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: December 29, 2015
    Assignee: Xerox Corporation
    Inventors: Amy A Grillo, Shigang Qiu, Peter V Nguyen, Chieh-Min Cheng
  • Publication number: 20150299466
    Abstract: Disclosed herein are formulations and processes for the preparation of pigment and wax dual dispersions by (1) providing a solution comprising a water and at least one surfactant in a dispersion apparatus comprising a container, a rotor-stator homogenizer, and a piston homogenizer coupled via a recirculation device; (2) adding at least one pigment to the solution; (3) forming a pigment dispersion by flowing the at least one pigment and the solution to the rotor-stator homogenizer via the recirculation device; (4) adding at least one wax to the pigment dispersion; and (5) flowing the at least one wax and pigment dispersion to the piston homogenizer via the recirculation device until a pigment and wax dual dispersion is formed. Also disclosed herein are pigment and wax dual dispersions, as well as a dispersion apparatus for preparing pigment and wax dual dispersions.
    Type: Application
    Filed: April 16, 2014
    Publication date: October 22, 2015
    Applicant: XEROX CORPORATION
    Inventors: SHIGANG QIU, MICHAEL D'AMATO, FRANK PING HAY LEE
  • Publication number: 20150286156
    Abstract: The disclosure provides robust phase inversion emulsification (PIE) processes, which produces polyester latex particles having particle size distributions with high centering capability indexes (Cpk), for the preparation of toners of good quality.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 8, 2015
    Applicant: XEROX CORPORATION
    Inventors: Shigeng Li, Shigang Qiu, Peter Van Nguyen, Amy Avolia Grillo, Chieh-Min Cheng
  • Publication number: 20150168858
    Abstract: A process for making a latex emulsion suitable for use in a toner composition which applies the model of Brinkman to predict phase inversion point (PIP) during phase invention emulsification (PIE), including using this model to calculate the amount of water needed to complete the phase inversion for solvent reuse formulation.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 18, 2015
    Applicant: Xerox Corporation
    Inventors: Shigeng Li, Shigang Qiu, Peter V. Nguyen, Linda S. Schriever, Amy A. Grillo, Chieh-Min Cheng
  • Publication number: 20150153663
    Abstract: An emulsion aggregation toner process that does not require addition of base to freeze toner particle growth is described.
    Type: Application
    Filed: December 2, 2013
    Publication date: June 4, 2015
    Applicant: Xerox Corporation
    Inventors: Abdisamed Sheik-Qasim, Richard PN Veregin, Mark R Elliott, Melanie L Davis, Shigang Qiu, Jay L Schneider, Randy P Tin, Magid Kamel, Cuong Vong, Edward G Zwartz