Patents by Inventor Maura A. Sweeney

Maura A. Sweeney 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
    Publication number: 20130280651
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles.
    Type: Application
    Filed: April 23, 2012
    Publication date: October 24, 2013
    Applicant: XEROX CORPORATION
    Inventors: Robert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
  • LOW GLOSS MONOCHROME SCD TONER FOR REDUCED ENERGY TONER USAGE
    Publication number: 20130260303
    Abstract: A toner composition including toner particles that have a resin, an optional wax, and an optional colorant; and a surface additive at least partially coating toner particle surfaces. The surface additive includes a mixture of a hexamethyldisilazane (HMDS) surface treated silica, a sol-gel silica that is not surface treated, and a polydimethylsiloxane (PDMS) surface treated silica.
    Type: Application
    Filed: April 3, 2012
    Publication date: October 3, 2013
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. KMIECIK-LAWRYNOWICZ, Brian S. WANG, Robert D. BAYLEY, Maura A. SWEENEY, Daniel W. ASARESE
  • TONER COMPOSITIONS
    Publication number: 20130252162
    Abstract: A process includes forming particles in a latex by emulsion polymerization of a mixture including one or more monomers in an emulsion, and about 4 percent or less by weight of the mixture of a non-surfactant-based charge control agent, the non-surfactant-based charge control agent is distributed within a matrix of the particles, and forming toner particles from the particles in the latex, the toner particles supporting a sufficient triboelectric charge for use under A-zone environmental conditions in a single-component development system.
    Type: Application
    Filed: May 16, 2013
    Publication date: September 26, 2013
    Applicant: XEROX CORPORATION
    Inventors: Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Susan J. LaFica
  • TONER COMPOSITION WITH CHARGE CONTROL AGENT-TREATED SPACER PARTICLES
    Publication number: 20130236825
    Abstract: Toner particles include a shell and a core, wherein the shell includes charge control agent-treated spacer particles that cause protrusions from the toner particle surface.
    Type: Application
    Filed: March 9, 2012
    Publication date: September 12, 2013
    Applicant: XEROX CORPORATION
    Inventors: Maura A. SWEENEY, Robert D. BAYLEY, Grazyna E. KMIECIK-LAWRYNOWICZ, Anne Marie SWEENEY-JONES
  • Toner compositions
    Patent number: 8475994
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are washed with a solution containing metal ions that impart desirable charging characteristics to the toner particles.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: July 2, 2013
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-lawrynowicz, Robert D. Bayley, Maura A. Sweeney, Mark E. Mang
  • Colored Toners
    Publication number: 20130157188
    Abstract: Disclosed is a toner composition comprising: (a) a resin; and (b) a colorant which comprises: (1) Pigment Red 269; (2) Pigment Red 185; and (3) Pigment Red 122.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Applicant: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Mark E. Mang, Kirk L. Stamp, Robert D. Bayley
  • Toner compositions
    Patent number: 8455171
    Abstract: The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a carboxylic acid may be added to materials utilized to produce a latex and reduce the particle size of the resulting latex particles and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the carboxylic acid.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: June 4, 2013
    Assignee: Xerox Corporation
    Inventors: Robert D. Bayley, Timothy L. Lincoln, Kevin F. Marcell, Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Daniel W. Asarese, Chieh-Min Cheng, Zhen Lai
  • Toner Composition
    Publication number: 20130101935
    Abstract: A toner is described containing low melt wax and having a core and shell, which toner exhibits improved fusing performance as compared to a toner produced with a high melt wax in the core; having a core resin with a Tg equal to or lower than that of the shell resin; or both.
    Type: Application
    Filed: October 24, 2011
    Publication date: April 25, 2013
    Applicant: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Daniel A. Asarese, Maura A. Sweeney, Robert D. Bayley, Mark Mang
  • Non-magnetic single component emulsion/aggregation toner composition
    Patent number: 8394566
    Abstract: A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and HMDS silica. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry theological properties. These improved properties make this toner composition useful for higher speed printing while using less toner.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: March 12, 2013
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Daniel W. Asarese, Samir Kumar, Juan A. Morales-Tirado, Michael F. Zona
  • TONER COMPOSITIONS
    Publication number: 20130052581
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are washed with a solution containing metal ions that impart desirable charging characteristics to the toner particles.
    Type: Application
    Filed: August 23, 2011
    Publication date: February 28, 2013
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. Kmiecik-lawrynowicz, Robert D. Bayley, Maura A. Sweeney, Mark E. Mang
  • Continuous process for producing toner using an oscillatory flow continuous reactor
    Patent number: 8338070
    Abstract: The present disclosure provides for oscillatory flow continuous reactors suitable for use in forming emulsion aggregation toners. The reactor may include at least one receptacle being a flexible, tubular member. The reactor may also include a plurality of baffles disposed, at spaced apart intervals, along an interior space of the tubular member, each of the plurality of baffles including one or more orifices. Additionally, one or more fluids may flow through the tubular member. The oscillatory flow continuous reactor may be used in an emulsion aggregation process to produce toner particles.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: December 25, 2012
    Assignee: Xerox Corporation
    Inventors: Mark E. Mang, Grazyna Kmiecik-Lawrynowicz, Eugene F. Young, Maura A. Sweeney
  • Clear Styrene Emulsion/Aggregation Toner
    Publication number: 20120288790
    Abstract: The present disclosure describes processes for making clear, high-gloss toners, including toner compositions resulting from such processes that find applications in overcoating and gloss enhancement.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 15, 2012
    Applicant: XEROX CORPORATION
    Inventors: Maura Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Robert D. Bayley, Dan Asarese
  • Toner compositions
    Patent number: 8252493
    Abstract: Single component toners are provided with at least one surface additive including a large polymeric spacer, and processes for producing the same. In embodiments, the toner is a non-magnetic single component toner produced by emulsion aggregation methods. The large polymeric spacer additives provide excellent flow characteristics to the resulting toners, and reduce the incidence of clogging failure and print defects such as ghosting, white bands, and low toner density compared with conventionally produced toners.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: August 28, 2012
    Assignee: Xerox Corporation
    Inventors: Samir Kumar, Grazyna L. Kmiecik-Lawrynowicz, Maura A. Sweeney, Michael L. Grande, Julie C. Pickering, Timothy L. Lincoln
  • TONER COMPOSITIONS AND DEVELOPERS CONTAINING SUCH TONERS
    Publication number: 20120129089
    Abstract: A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and two HMDS silicas. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry rheological properties and improved fix properties. These improved properties make this toner composition useful for higher speed printing while using less toner.
    Type: Application
    Filed: November 24, 2010
    Publication date: May 24, 2012
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. KMIECIK-LAWRYNOWICZ, Maura A. SWEENEY, Daniel W. ASARESE, Robert CORLETO, Samir KUMAR, Juan A. MORALES-TIRADO, Michael F. ZONA
  • NON-MAGNETIC SINGLE COMPONENT EMULSION/AGGREGATION TONER COMPOSITION
    Publication number: 20120129088
    Abstract: A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and HMDS silica. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry theological properties. These improved properties make this toner composition useful for higher speed printing while using less toner.
    Type: Application
    Filed: November 24, 2010
    Publication date: May 24, 2012
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. KMIECIK-LAWRYNOWICZ, Maura A. SWEENEY, Daniel W. ASARESE, Samir KUMAR, Juan A. MORALES-TIRADO, Michael F. ZONA
  • CONTINUOUS PROCESS FOR PRODUCING TONER USING AN OSCILLATORY FLOW CONTINUOUS REACTOR
    Publication number: 20120021351
    Abstract: The present disclosure provides for oscillatory flow continuous reactors suitable for use in forming emulsion aggregation toners. The reactor may include at least one receptacle being a flexible, tubular member. The reactor may also include a plurality of baffles disposed, at spaced apart intervals, along an interior space of the tubular member, each of the plurality of baffles including one or more orifices. Additionally, one or more fluids may flow through the tubular member. The oscillatory flow continuous reactor may be used in an emulsion aggregation process to produce toner particles.
    Type: Application
    Filed: July 20, 2010
    Publication date: January 26, 2012
    Applicant: Xerox Corporation
    Inventors: Mark E. Mang, Grazyna Kmiecik-Lawrynowicz, Eugene F. Young, Maura A. Sweeney
  • Toner compositions
    Patent number: 8092973
    Abstract: The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a gel latex may be formed as a seed particle and then utilized to form latex resins and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the gel latex.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: January 10, 2012
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Chieh-Min Cheng, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Daniel G. Marsh, Emily L. Moore, Shigang Qiu, Tie Hwee Ng
  • Supercritical fluid microencapsulation of dye into latex for improved emulsion aggregation toner
    Patent number: 7985526
    Abstract: The present disclosure provides methods for incorporating a dye into latex particles via a supercritical fluid microencapsulation technique, in order to achieve improved dispersion of a colorant in the latex and an increase in color gamut.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: July 26, 2011
    Assignee: Xerox Corporation
    Inventors: Maura A. Sweeney, Grazyna Kmiecik-Lawrynowicz, Robert D. Bayley
  • TONER COMPOSITIONS
    Publication number: 20110117486
    Abstract: The present disclosure provides polyesters suitable for use in forming toners. In embodiments, a polyester may be subjected to phase inversion emulsification, in which charge control agents are added so that the polyester emulsion includes charge control agents therein. The resulting polyester emulsion with charge control agents may then be utilized to form toner particles.
    Type: Application
    Filed: November 16, 2009
    Publication date: May 19, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert D. Bayley, Yuhua Tong, Timothy L. Lincoln, Grazyna Kmiecik-Lawrynowicz, Maura A. Sweeney
  • TONER COMPOSITIONS
    Publication number: 20110091801
    Abstract: The present disclosure provides toners and methods for their production. In embodiments, the amount of coagulant utilized in producing those toners may be less than amounts currently in use, which may have a beneficial effect by reducing the time for coalescence. Modified waxes may also be utilized which provide excellent gloss and charging characteristics.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 21, 2011
    Applicant: XEROX CORPORATION
    Inventors: Mark E. Mang, Grazyna Kmiecik-Lawrynowicz, Maura A. Sweeney, Timothy L. Lincoln