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).

  • Tuning Toner Gloss with Bio-based Stabilizers
    Publication number: 20150118609
    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: Application
    Filed: January 6, 2015
    Publication date: April 30, 2015
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Preparing Amorphous Polyester Resin Emulsions
    Publication number: 20150104743
    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: Application
    Filed: December 22, 2014
    Publication date: April 16, 2015
    Inventors: Shigang Qiu, Richard PN Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
  • LATEX FORMING PROCESS COMPRISING CONCURRENT STEAM INJECTION EMULSIFICATION AND SOLVENT DISTILLATION
    Publication number: 20150086922
    Abstract: A process includes dissolving a polymer in an organic solvent to form a polymer solution and forming a latex from the polymer solution by contacting the polymer solution with steam while substantially simultaneously distilling the organic solvent.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: XEROX CORPORATION
    Inventors: Yu Liu, Yulin Wang, Ke Zhou, Frank Ping-Hay Lee, Marko Saban, Shigang Qiu, Sonja Hadzidedic
  • Tuning toner gloss with bio-based stabilizers
    Patent number: 8927679
    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 15, 2013
    Date of Patent: January 6, 2015
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Sustainable toner
    Patent number: 8916322
    Abstract: The present disclosure describes toner that is composed substantially of biodegradable and recycled materials.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: December 23, 2014
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Shigang Qiu, Santiago Faucher, Ke Zhou, John Abate, John Kallo
  • Preparing amorphous polyester resin emulsions
    Patent number: 8916320
    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: January 15, 2013
    Date of Patent: December 23, 2014
    Assignee: Xerox Corporation
    Inventors: Shigang Qiu, Richard P N Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
  • Production of Latex using a Wipe Film Evaporator
    Publication number: 20140370437
    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: Application
    Filed: June 18, 2013
    Publication date: December 18, 2014
    Inventors: Amy A. Grillo, Shigang Qiu, Peter V. Nguyen, Chieh-Min Cheng
  • Acoustic method to prepare polyester resin emulsions
    Patent number: 8889331
    Abstract: The disclosure relates to a process for making a latex emulsion suitable for use in a toner comprising at least one amorphous polyester resin and a solvent to form a resin mixture, including that the process is carried out at room temperature using acoustic mixing.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: November 18, 2014
    Assignee: Xerox Corporation
    Inventors: Shigang Qiu, Santiago Faucher
  • Recycled polyethylene terephthalate-based toner
    Patent number: 8835088
    Abstract: The present disclosure describes toner comprising a portion of resin comprising a polyethylene terephthalate oligomer.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: September 16, 2014
    Assignee: Xerox Corporation
    Inventors: Guerino G Sacripante, Shigang Qiu, Santiago Faucher
  • Preparing Colorant Dispersions Using Acoustic Mixing
    Publication number: 20140248558
    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: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Applicant: XEROX CORPORATION
    Inventors: Shigang Qiu, Santiago Faucher, Kimberly D. Nosella, David R. Kurceba, Yulin Wang, Karina Lopez
  • Acoustic Method to Prepare Polyester Resin Emulsions
    Publication number: 20140248559
    Abstract: The disclosure relates to a process for making a latex emulsion suitable for use in a toner comprising at least one amorphous polyester resin and a solvent to form a resin mixture, including that the process is carried out at room temperature using acoustic mixing.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Applicant: XEROX CORPORATION
    Inventors: Shigang Qiu, Santiago Faucher
  • Tuning Toner Gloss with Bio-based Stabilizers
    Publication number: 20140199623
    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: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Preparing Amorphous Polyester Resin Emulsions
    Publication number: 20140199625
    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: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: XEROX CORPORATION
    Inventors: Shigang Qiu, Richard PN Veregin, Kimberly D. Nosella, Santiago Faucher, Cuong Vong, Enno E. Agur
  • Efficient solvent-based phase inversion emulsification process with defoamer
    Patent number: 8741534
    Abstract: A process and system for making a resin emulsion suitable for use in forming toner particles including a silicone free anti-foam agent to control foam during formation of a polyester dispersion.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: June 3, 2014
    Assignee: Xerox Corporation
    Inventors: Zhaoyang Ou, Robert D. Bayley, Zhen Lai, Rashid Mahmood, David R. Kurceba, John Abate, Shigang Qiu, Chieh-Min Cheng
  • Toner with improved charging
    Patent number: 8741532
    Abstract: The disclosure describes a toner process in which portion-wise addition of colorant(s) during particle formation is used to control the distribution of colorant within the toner particle, thereby enhancing A zone charge.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: June 3, 2014
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Shigang Qiu, Kimberly Nosella, Cuong Vong
  • Sustainable Toner
    Publication number: 20140134534
    Abstract: The present disclosure describes toner that is composed substantially of biodegradable and recycled materials.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, Shigang Qiu, Santiago Faucher, Ke Zhou, John Abate, John Kallo
  • Recycled Polyethylene Terephthalate-Based Toner
    Publication number: 20140134533
    Abstract: The present disclosure describes toner comprising a portion of resin comprising a polyethylene terephthalate oligomer.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, Shigang Qiu, Santiago Faucher
  • Toner having titania and processes thereof
    Patent number: 8617780
    Abstract: The present disclosure provides white toner compositions and processes for making same. In embodiments, a desirable white toner may be produced without having to resort to excessive pigment loading, having desirable gloss characteristics.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: December 31, 2013
    Assignee: Xerox Corporation
    Inventors: Yi Xin Gong, Daryl W. Vanbesien, Shigang Qiu, Edward Graham Zwartz, Karen Ann Moffat, Richard P. N. Veregin, Cuong Vong, C. Geoffrey Allen
  • Processes for producing polyester latexes via solvent-free emulsification
    Patent number: 8618192
    Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one amorphous polyester resin with a viscosity reducing additive in the absence of an organic solvent to form a resin mixture either via an extruder or batch process, and adding a surfactant, neutralizing agent, and deionized water to the resin mixture.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: December 31, 2013
    Assignee: Xerox Corporation
    Inventors: Santiago Faucher, Joo T. Chung, Timothy L. Lincoln, Shigang Qiu, Yuhua Tong, Fumii Higuchi, Emine Irmak Serifoglu, Allan K. Chen, Brian J. Andaya, Joseph L. Leonardo
  • Self emulsifying granules and process for the preparation of emulsions therefrom
    Patent number: 8563627
    Abstract: A process for making a self-emulsifying granule suitable for use in forming latex emulsions includes contacting a resin with a solid or highly concentrated surfactant, a solid neutralization agent and water in the absence of an organic solvent to form a mixture, melt mixing the mixture, and forming self-emulsifying granules of the melt mixed mixture. Self-emulsifying granules are also provided and configured to form a latex emulsion when added to water, which may then be utilized to form a toner.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: October 22, 2013
    Assignee: Xerox Corporation
    Inventors: Santiago Faucher, Joo T. Chung, Shigang Qiu, Fumii Higuchi