Patents by Inventor David J.W. Lawton

David J.W. Lawton 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).

  • Toner compositions with white colorants and processes of making thereof
    Patent number: 10705442
    Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 75.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: July 7, 2020
    Assignee: XEROX CORPORATION
    Inventors: Karen A. Moffat, David J. W. Lawton, Melanie L. Davis, Juan A. Morales-Tirado, Varun Sambhy
  • TONER COMPOSITIONS WITH WHITE COLORANTS AND PROCESSES OF MAKING THEREOF
    Publication number: 20180173128
    Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 75.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 21, 2018
    Inventors: Karen A. Moffat, David J.W. Lawton, Melanie L. Davis, Juan A. Morales-Tirado, Varun Sambhy
  • TONER COMPOSITIONS WITH WHITE COLORANTS AND PROCESSES OF MAKING THEREOF
    Publication number: 20180173127
    Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 70 and, in further embodiments, at least 75.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 21, 2018
    Inventors: KAREN A. MOFFAT, DAVID J.W. LAWTON, MELANIE L. DAVIS, JUAN A. MORALES-TIRADO, VARUN SAMBHY, RICHARD P.N. VEREGIN
  • TONER COMPOSITIONS WITH WHITE COLORANTS AND PROCESSES OF MAKING THEREOF
    Publication number: 20180157187
    Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 75.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Inventors: KAREN A. MOFFAT, DAVID J.W. LAWTON, MELANIE L. DAVIS, JUAN A. MORALES-TIRADO, VARUN SAMBHY, RICHARD P.N. VEREGIN
  • TONER COMPOSITIONS WITH WHITE COLORANTS AND PROCESSES OF MAKING THEREOF
    Publication number: 20180039194
    Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 75.
    Type: Application
    Filed: August 3, 2016
    Publication date: February 8, 2018
    Inventors: Karen A. MOFFAT, DAVID J.W. LAWTON, MELANIE L. DAVIS, JUAN A. MORALES-TIRADO, VARUN SAMBHY
  • Emulsion aggregation toners
    Patent number: 9639015
    Abstract: Disclosed is toner particles having controlled and tailorable fusing characteristics. In particular, there is provided toner particles comprising styrene acrylate which have specific shape characteristics that allow for tailorable fusing characteristics without generating a detrimental effect on the blocking characteristics of such toners.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: May 2, 2017
    Assignee: XEROX CORPORATION
    Inventors: Juan A. Morales-Tirado, David J. W. Lawton, Edward G. Zwartz, Vincenzo G. Marcello, Yolanda E. Maldonado, David R. Kurceba
  • Continuous Coalescence Process for Sustainable Toner
    Publication number: 20170003609
    Abstract: A continuous coalescence process for preparing a sustainable toner is described which features toner with lowered melt properties and higher toner surface carbon to oxygen (C/O) ratios than previously described sustainable resins coalesced in a batch reactor.
    Type: Application
    Filed: July 1, 2015
    Publication date: January 5, 2017
    Inventors: David J.W. Lawton, Ke Zhou, Kimberly D. Nosella, Melanie L. Davis, Guerino G. Sacripante, Richard P.N. Veregin
  • Continuous coalescence process for sustainable toner
    Patent number: 9535348
    Abstract: A continuous coalescence process for preparing a sustainable toner is described which features toner with lowered melt properties and higher toner surface carbon to oxygen (C/O) ratios than previously described sustainable resins coalesced in a batch reactor.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: January 3, 2017
    Assignee: Xerox Corporation
    Inventors: David J W Lawton, Ke Zhou, Kimberly D Nosella, Melanie L Davis, Guerino G Sacripante, Richard P N Veregin
  • Latex preparation using an agitated reactor column
    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
  • POROUS RESIN PARTICLES
    Publication number: 20160274478
    Abstract: Porous resin particles of from about 3 ?m to about 25 ?m size made in an emulsion aggregation process where coalescence occurs under continuous conditions which enable, for example, more rapid coalescence, are described.
    Type: Application
    Filed: June 2, 2016
    Publication date: September 22, 2016
    Inventors: David J.W. Lawton, Chieh-Min Cheng, David R. Kurceba, Eric J. Young
  • Toner particles comprising both polyester and styrene acrylate polymers having a polyester shell
    Patent number: 9383666
    Abstract: Toners and processes useful in providing toners suitable for electrophotographic apparatuses, including apparatuses such as digital, image-on-image, and similar apparatuses. In particular, emulsion aggregation toners that comprise toner particles having a core composed of either polyester resin or both styrene-acrylate and polyester resins. These embodiments also comprise a shell disposed over the core, wherein the shell comprises styrene-acrylate resin.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: July 5, 2016
    Assignee: XEROX CORPORATION
    Inventors: David J. W. Lawton, Richard P. N. Veregin, Guerino G. Sacripante, Melanie Lynn Davis, Edward G. Zwartz
  • Hybrid emulsion aggregate toner
    Patent number: 9128395
    Abstract: Toners and processes useful in providing toners suitable for electrophotographic apparatuses, including apparatuses such as digital, image-on-image, and similar apparatuses. In particular, emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies and which comprise a base resin composed of both styrene-acrylate and polyester resins. These toner compositions further include polyaluminum chloride (PAC) instead of the more commonly used aluminum sulfate as the flocculant or aggregating agent.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: September 8, 2015
    Assignee: XEROX CORPORATION
    Inventors: Kimberly D. Nosella, Guerino G. Sacripante, Richard P. N. Veregin, Edward G. Zwartz, David J. W. Lawton
  • EMULSION AGGREGATION TONERS
    Publication number: 20150160574
    Abstract: Disclosed is toner particles having controlled and tailorable fusing characteristics. In particular, there is provided toner particles comprising styrene acrylate which have specific shape characteristics that allow for tailorable fusing characteristics without generating a detrimental effect on the blocking characteristics of such toners.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 11, 2015
    Applicant: XEROX CORPORATION
    Inventors: Juan A. Morales-Tirado, David J.W. Lawton, Edward G. Zwartz, Vincenzo G. Marcello, Yolanda E. Maldonado, David R. Kurceba
  • Hybrid emulsion aggregate toner
    Patent number: 9046801
    Abstract: Emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies. Namely, there is provided an emulsion aggregation toner that comprises a base resin composed of both styrene-acrylate and polyester resins. Such hybrid emulsion aggregation toner compositions are lower in cost but still maintain desirable developer properties like low minimum fusing temperature (MFT) and lower dielectric loss.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: June 2, 2015
    Assignee: XEROX CORPORATION
    Inventors: Kimberly D. Nosella, Guerino G. Sacripante, Edward G. Zwartz, Richard P. N. Veregin, Michael S. Hawkins, David J. W. Lawton
  • Toner processes for hyper-pigmented toners
    Patent number: 9023574
    Abstract: The present embodiments relate to processes of preparing toner particles. More specifically, the processes produce toner particles having high pigment loadings and desired circularity. The processes include diluting the aggregated particulate mixture prior to coalescence.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: May 5, 2015
    Assignee: Xerox Corporation
    Inventors: Jordan H. Wosnick, Melanie L. Davis, David J. W. Lawton
  • HYBRID EMULSION AGGREGATE TONER
    Publication number: 20150118610
    Abstract: Toners and processes useful in providing toners suitable for electrophotographic apparatuses, including apparatuses such as digital, image-on-image, and similar apparatuses. In particular, emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies and which comprise a base resin composed of both styrene-acrylate and polyester resins. These toner compositions further include polyaluminum chloride (PAC) instead of the more commonly used aluminum sulfate as the flocculant or aggregating agent.
    Type: Application
    Filed: January 22, 2014
    Publication date: April 30, 2015
    Applicant: XEROX CORPORATION
    Inventors: Kimberly D. Nosella, Guerino G. Sacripante, Richard P.N. Veregin, Edward G. Zwartz, David J.W. Lawton
  • HYBRID EMULSION AGGREGATE TONER
    Publication number: 20150118613
    Abstract: Emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies. Namely, there is provided an emulsion aggregation toner that comprises a base resin composed of both styrene-acrylate and polyester resins. Such hybrid emulsion aggregation toner compositions are lower in cost but still maintain desirable developer properties like low minimum fusing temperature (MFT) and lower dielectric loss.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: XEROX CORPORATION
    Inventors: KIMBERLY D. NOSELLA, Guerino G. Sacripante, Edward G. Zwartz, Richard P.N. Veregin, Michael S. Hawkins, David J.W. Lawton
  • TONER PROCESSES FOR HYPER-PIGMENTED TONERS
    Publication number: 20150004542
    Abstract: The present embodiments relate to processes of preparing toner particles. More specifically, the processes produce toner particles having high pigment loadings and desired circularity. The processes include diluting the aggregated particulate mixture prior to coalescence.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: Jordan H. Wosnick, Melanie L. Davis, David J.W. Lawton