Patents by Inventor Grazyna E. Kmiecik-Lawrynowicz

Grazyna E. Kmiecik-Lawrynowicz 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: 8900787
    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: Grant
    Filed: May 16, 2013
    Date of Patent: December 2, 2014
    Assignee: Xerox Corporation
    Inventors: Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Susan J. LaFica
  • Publication number: 20140315127
    Abstract: Emulsion aggregation toner comprising: a resin; a wax; a colorant; an encapsulating shell; and a silica external additive comprising: first silica particles comprising fumed silica particles surface treated with octyldimethylsiloxane and having average particle diameter about 6-20 nm, present in amount of about 0.1-1% by weight of the toner; second silica particles comprising colloidal silica particles surface treated with hexamethyldisiloxane and having average particle diameter about 80-200 nm, present in amount of about 1-2% by weight of the toner; third silica particles comprising fumed silica particles surface treated with polydimethylsiloxane and having average particle diameter about 25-65 nm, present in amount of from about 0.5-1.5% by weight of the toner; and fourth silica particles comprising fumed silica particles surface treated with hexamethyldisiloxane and having average particle diameter about 25-65 nm, present in amount of about 1-2.5% by weight of the toner.
    Type: Application
    Filed: April 17, 2013
    Publication date: October 23, 2014
    Applicant: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Samir Kumar, Daniel W. Asarese
  • Publication number: 20140315123
    Abstract: Disclosed is an emulsion aggregation toner substantially free of added colorants comprising a resin and a silicone wax of the formula wherein the silicone wax has a weight average molecular weight of from about 5,000 to about 17,000 and a melting temperature of from about 38° C. to about 65° C.
    Type: Application
    Filed: April 17, 2013
    Publication date: October 23, 2014
    Applicant: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Robert D. Bayley, Witold J. Lawrynowicz
  • Patent number: 8852835
    Abstract: The present disclosure describes a black single component toner with desirable fusing performance.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: October 7, 2014
    Assignee: Xerox Corporation
    Inventors: Grazyna E Kmiecik-Lawrynowicz, Michael F Zona, Mark E Mang, Maura A Sweeney, Robert D Bayley
  • Publication number: 20140272701
    Abstract: A toner composition includes toner particles containing a resin; an optional wax; and an optional colorant, wherein the resin is a three latex system including a latex core, a latex shell, and a latex gel; and a glass transition temperature Tg of the latex core is lower than a glass transition temperature Tg of the latex shell.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. KMIECIK-LAWRYNOWICZ, Maura A. SWEENEY, Daniel W. ASARESE, Robert D. BAYLEY
  • Publication number: 20140255841
    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: May 22, 2014
    Publication date: September 11, 2014
    Applicant: XEROX CORPORATION
    Inventors: Robert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
  • Patent number: 8785102
    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: Grant
    Filed: April 23, 2012
    Date of Patent: July 22, 2014
    Assignee: Xerox Corporation
    Inventors: Robert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
  • Patent number: 8778582
    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 the toner particles are made without a shell which provides homogenous distribution of the charge control agents, providing a toner with higher charge and better environmental stability.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 15, 2014
    Assignee: Xerox Corporation
    Inventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang
  • Publication number: 20140162184
    Abstract: The present disclosure describes a color single component toner with desirable fusing performance.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Michael F. Zona, Mark E. Mang, Maura A. Sweeney, Robert D. Bayley
  • Publication number: 20140162181
    Abstract: The present disclosure describes a black single component toner with desirable fusing performance.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E Kmiecik-Lawrynowicz, Michael F. Zona, Mark E. Mang, Maura A. Sweeney, Robert D. Bayley
  • Publication number: 20140127620
    Abstract: A toner particle has a core and a shell surrounding the core, wherein the shell contains a polymerized charge enhanced spacer particle, which is a copolymer of a charge control agent and a monomer. A method of making toner particles includes forming a slurry by mixing together a first emulsion containing a resin, optionally a wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additive, heating the slurry to form aggregated particles in the slurry, forming a second emulsion containing a monomer and a charge control agent, polymerizing the second emulsion to form a copolymer of the monomer and the charge control agent, and incorporating the copolymer into the toner particles, wherein the aggregated particles form a core of the toner particles.
    Type: Application
    Filed: November 2, 2012
    Publication date: May 8, 2014
    Applicant: XEROX CORPORATION
    Inventors: Robert D. BAYLEY, Maura A. SWEENEY, Grazyna E. KMIECIK-LAWRYNOWICZ
  • Publication number: 20140120467
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics.
    Type: Application
    Filed: November 1, 2012
    Publication date: May 1, 2014
    Applicant: Xerox Corporation
    Inventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang
  • Patent number: 8703374
    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: Grant
    Filed: March 9, 2012
    Date of Patent: April 22, 2014
    Assignee: Xerox Corporation
    Inventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Anne Marie Sweeney-Jones
  • Patent number: 8697323
    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: Grant
    Filed: April 3, 2012
    Date of Patent: April 15, 2014
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang, Robert D. Bayley, Maura A. Sweeney, Daniel W. Asarese
  • Patent number: 8691485
    Abstract: The present disclosure provides toners and methods for their production. In embodiments, the toner may include a core/shell configuration, with a non-crosslinked resin and a crosslinked resin in the core, with a second non-crosslinked resin in the shell, pigment/pigments and a wax possessing both branched and linear carbons.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: April 8, 2014
    Assignee: Xerox Corporation
    Inventors: Daniel W. Asarese, Grazyna E. Kmiecik-Lawrynowicz, Samir Kumar, Maura A. Sweeney, Siddhesh N. Pawar, Robert D. Bayley
  • Patent number: 8592115
    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: Grant
    Filed: November 24, 2010
    Date of Patent: November 26, 2013
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Daniel W. Asarese, Robert Corleto, Samir Kumar, Juan A. Morales-Tirado, Michael F. Zona
  • Patent number: 8586271
    Abstract: Included is an emulsion aggregation toner formulation having at least one latex and a combination of at least two waxes, wherein one wax is a synthetic wax, and another wax is a natural wax, and further including a developer containing a carrier and the just-described toner.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: November 19, 2013
    Assignee: Xerox Corporation
    Inventors: Daniel W Asarese, Grazyna E Kmiecik-Lawrynowicz, Eugene F Young, William H Hollenbaugh, Jr., Eunhee Lee
  • Patent number: 8580469
    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: Grant
    Filed: December 15, 2011
    Date of Patent: November 12, 2013
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Mark E. Mang, Kirk L. Stamp, Robert D. Bayley
  • 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
  • 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