Patents by Inventor George Liebermann

George Liebermann 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: 8193344
    Abstract: Processes for making photosensitive organic pigments for use in imaging members, specifically processes for making a photosensitive phthalocyanine pigments having a specific crystal form, comprising dissolving the pigment in a mixture of a haloacetic acid and alkylene halide to form a solution, precipitating the pigment by adding the solution to a non-solvent system, the solution comprised of one or more organic solvents and a small amount of water, wherein the amount of water controls the crystal form of the pigment, followed by a treatment with a halobenzene to obtain a highly photosensitive second crystal form of the pigment.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: June 5, 2012
    Assignee: Xerox Corporation
    Inventors: George Liebermann, Marko Saban, Sandra Gardner, Cuong Vong
  • Patent number: 7947825
    Abstract: Processes for making organic pigments useful in imaging members, specifically for pigments that after further polymorphic conversion may be used in a charge generating layer of an imaging member. More specifically, there are described processes for producing titanyl phthalocyanine (TiOPc) in high yields using tetrahydronaphthalene as reaction solvent, such as TiOPc Type I. This pigment can be successfully converted to a high sensitivity crystal form useful as charge generating pigment in an imaging member.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: May 24, 2011
    Assignee: Xerox Corporation
    Inventors: Marko D. Saban, George Liebermann, Roger E. Gaynor, Sandra Gardner, Cuong Vong, Evelyn Juandi
  • Publication number: 20110087020
    Abstract: Processes for making photosensitive organic pigments for use in imaging members, specifically processes for making a photosensitive phthalocyanine pigments having a specific crystal form, comprising dissolving the pigment in a mixture of a haloacetic acid and alkylene halide to form a solution, precipitating the pigment by adding the solution to a non-solvent system, the solution comprised of one or more organic solvents and a small amount of water, wherein the amount of water controls the crystal form of the pigment, followed by a treatment with a halobenzene to obtain a highly photosensitive second crystal form of the pigment.
    Type: Application
    Filed: December 14, 2010
    Publication date: April 14, 2011
    Applicant: XEROX CORPORATION
    Inventors: George Liebermann, Marko Saban, Sandra Gardner, Cuong Vong
  • Patent number: 7888501
    Abstract: Processes for making photosensitive organic pigments for use in imaging members, specifically processes for making a photosensitive phthalocyanine pigments having a specific crystal form, comprising dissolving the pigment in a mixture of a haloacetic acid and alkylene halide to form a solution, precipitating the pigment by adding the solution to a non-solvent system, the solution comprised of one or more organic solvents and a small amount of water, wherein the amount of water controls the crystal form of the pigment, followed by a treatment with a halobenzene to obtain a highly photosensitive second crystal form of the pigment.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: February 15, 2011
    Assignee: Xerox Corporation
    Inventors: George Liebermann, Marko Saban, Sandra Gardner, Cuong Vong
  • Patent number: 7851549
    Abstract: A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: December 14, 2010
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, George Liebermann, Nathan Belliveau, Shigang S. Qiu
  • Patent number: 7713674
    Abstract: An emulsion polymerization process comprising polymerizing monomer in an emulsion in a reaction vessel at a first temperature to form a resin; cooling the reaction vessel to a second temperature that is above the softening point of the resin yet below the temperature required for significant depolymerization reaction to occur; and adding water to the cooled reaction vessel in an amount sufficient to effect phase inversion with mixing for a sufficient time to form an aqueous latex emulsion in the absence of a surfactant.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: May 11, 2010
    Assignee: Xerox Corporation
    Inventors: Allan Kwok-Wai Chen, Milan Maric, Tie Hwee Ng, George Liebermann, Enno Eric Agur, Hadi Khan Mahabadi
  • Patent number: 7666560
    Abstract: An imaging member includes a charge generating layer and a charge transport layer. The charge transport layer includes a first surface in contact with the charge generating layer and a second surface. The charge transport layer includes a film forming polymer binder and a charge transport component dispersed therein. The concentration of the charge transport component in the charge transport layer is at a peak in a region of the charge transport intermediate the first and second surfaces of the charge transport layer.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: February 23, 2010
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony M. Horgan, Kent Evans, George Liebermann, Kathleen M. Carmichael, Dennis J. Prosser, Richard L. Post, Edward Domm, Johann Junginger, Michael Zak
  • Publication number: 20090155712
    Abstract: A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 18, 2009
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, George Liebermann, Nathan Belliveau, Shigang S. Qiu
  • Publication number: 20080194814
    Abstract: Processes for making organic pigments useful in imaging members, specifically for pigments that after further polymorphic conversion may be used in a charge generating layer of an imaging member. More specifically, there are described processes for producing titanyl phthalocyanine (TiOPc) in high yields using tetrahydronaphthalene as reaction solvent, such as TiOPc Type I. This pigment can be successfully converted to a high sensitivity crystal form useful as charge generating pigment in an imaging member.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Applicant: Xerox Corporation
    Inventors: Marko D. Saban, George Liebermann, Roger E. Gaynor, Sandra Gardner, Cuong Vong, Evelyn Juandi
  • Publication number: 20080194813
    Abstract: Processes for making photosensitive organic pigments for use in imaging members, specifically processes for making a photosensitive phthalocyanine pigments having a specific crystal form, comprising dissolving the pigment in a mixture of a haloacetic acid and alkylene halide to form a solution, precipitating the pigment by adding the solution to a non-solvent system, the solution comprised of one or more organic solvents and a small amount of water, wherein the amount of water controls the crystal form of the pigment, followed by a treatment with a halobenzene to obtain a highly photosensitive second crystal form of the pigment.
    Type: Application
    Filed: February 14, 2007
    Publication date: August 14, 2008
    Applicant: Xerox Corporation
    Inventors: George Liebermann, Marko Saban, Sandra Gardner, Cuong Vong
  • Patent number: 7229732
    Abstract: A composition comprised of a charge transport compound and a crosslinked polymer composition generated from the curing of a solution of a hydroxyl pendant polycarbonate, a hydroxylated charge transport compound, a curing agent and a solvent.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: June 12, 2007
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, Timothy P. Bender, Ah-Mee Hor, H Bruce Goodbrand, Yvan Gagnon, George Liebermann
  • Publication number: 20070059630
    Abstract: An emulsion polymerization process comprising polymerizing monomer in an emulsion in a reaction vessel at a first temperature to form a resin; cooling the reaction vessel to a second temperature that is above the softening point of the resin yet below the temperature required for significant depolymerization reaction to occur; and adding water to the cooled reaction vessel in an amount sufficient to effect phase inversion with mixing for a sufficient time to form an aqueous latex emulsion in the absence of a surfactant.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 15, 2007
    Inventors: Allan Chen, Milan Maric, Tie Ng, George Liebermann, Enno Agur, Hadi Mahabadi
  • Publication number: 20070059616
    Abstract: An imaging member includes a conductive substrate, a SiOx layer coated over the conductive substrate, a charge generating layer coated over the SiOx layer, and a charge transport layer
    Type: Application
    Filed: September 12, 2005
    Publication date: March 15, 2007
    Applicant: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony Horgan, Kent Evans, George Liebermann, Ah-Mee Hor, Min-Hong Fu, Richard Post, Kathleen Carmichael, Satish Parikh, Edward Grabowski, Donald Goodman, Gregory Kovacs
  • Patent number: 7172712
    Abstract: A method of making a multichromal sphere includes the steps of preparing a composition of at least (1) a matrix material and (2) at least two sets of particles, each of the sets of particles having a color different from at least one of another of the sets of particles and a segregation (e.g., an electrical or magnetic) property different from at least one of another of the sets of particles, encapsulating the composition within a shell to form an encapsulated sphere, immobilizing the encapsulated sphere in a manner to restrict at least rotation of the encapsulated sphere, subjecting the immobilized encapsulated sphere to an external field associated with the segregation property different among the sets of particles, under conditions in which the sets of particles are able to migrate within the matrix material, thereby producing color segregation in the immobilized encapsulated sphere, and solidifying the matrix material while substantially maintaining the color segregation.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: February 6, 2007
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Barkev Keoshkerian, George Liebermann, Naveen Chopra, Hadi K. Mahabadi, Jaan Noolandi, Francisco E. Torres
  • Publication number: 20060286471
    Abstract: An imaging member includes a charge generating layer and a charge transport layer. The charge transport layer includes a first surface in contact with the charge generating layer and a second surface. The charge transport layer includes a film forming polymer binder and a charge transport component dispersed therein. The concentration of the charge transport component in the charge transport layer is at a peak in a region of the charge transport intermediate the first and second surfaces of the charge transport layer.
    Type: Application
    Filed: June 21, 2005
    Publication date: December 21, 2006
    Inventors: Satchidanand Mishra, Anthony Horgan, Kent Evans, George Liebermann, Kathleen Carmichael, Dennis Prosser, Richard Post, Edward Domm, Johann Junginger, Michael Zak
  • Patent number: 7029817
    Abstract: A toner process comprising the aggregation and coalescence of a sulfonated polyester and a colorant, and wherein said polyester possesses a degree of sulfonation or a sulfonation percentage of from about 0.5 to about 3 mol percent.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: April 18, 2006
    Assignee: Xerox Corporation
    Inventors: Sarah J. P. Robinson, Thomas E. Enright, Alan E. J. Toth, Milan Maric, Michael S. Hawkins, Marko D. Saban, Guerino G. Sacripante, George Liebermann
  • Publication number: 20050181296
    Abstract: A toner process comprising the aggregation and coalescence of a sulfonated polyester and a colorant, and wherein said polyester possesses a degree of sulfonation or a sulfonation percentage of from about 0.5 to about 3 mol percent.
    Type: Application
    Filed: February 13, 2004
    Publication date: August 18, 2005
    Inventors: Sarah Robinson, Thomas Enright, Alan Toth, Milan Maric, Michael Hawkins, Marko Saban, Guerino Sacripante, George Liebermann
  • Publication number: 20040202862
    Abstract: A method of making a multichromal sphere includes the steps of preparing a composition of at least (1) a matrix material and (2) at least two sets of particles, each of the sets of particles having a color different from at least one of another of the sets of particles and a segregation (e.g., an electrical or magnetic) property different from at least one of another of the sets of particles, encapsulating the composition within a shell to form an encapsulated sphere, immobilizing the encapsulated sphere in a manner to restrict at least rotation of the encapsulated sphere, subjecting the immobilized encapsulated sphere to an external field associated with the segregation property different among the sets of particles, under conditions in which the sets of particles are able to migrate within the matrix material, thereby producing color segregation in the immobilized encapsulated sphere, and solidifying the matrix material while substantially maintaining the color segregation.
    Type: Application
    Filed: April 14, 2003
    Publication date: October 14, 2004
    Inventors: Peter M. KAZMAIER, Barkev KEOSHKERIAN, George LIEBERMANN, Naveen CHOPRA, Hadi K. MAHABADI, Jaan NOOLANDI, Francisco E. TORRES
  • Patent number: 6696552
    Abstract: A process which comprises admixing in the absence of a solvent an amine of the formula R1—NH2 and a first ester of the formula wherein R2 is an electron withdrawing group and R3 is an alkyl group; heating the mixture containing the amine and the first ester to form an intermediate compound of the formula admixing the intermediate compound with a base and a second ester of the formula said second ester being present in a molar excess relative to the intermediate compound, said base being present in a molar excess relative to the intermediate compound, and heating the mixture to form a pyridone compound of the formula or a salt thereof. Also disclosed is a process for preparing diazopyridone colorants which comprises preparing a pyridone compound by the above process and reacting the pyridone compound with a diazonium salt to form a diazopyridone compound.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: February 24, 2004
    Assignee: Xerox Corporation
    Inventors: James D. Mayo, James M. Duff, Rina Carlini, Roger E. Gaynor, George Liebermann
  • Publication number: 20040006234
    Abstract: Disclosed is a process for preparing substituted pyridone compounds which comprises (a) admixing in the absence of a solvent (1) an amine of the formula R1—NH2 wherein R1 is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and (2) a first ester of the formula 1
    Type: Application
    Filed: June 27, 2002
    Publication date: January 8, 2004
    Applicant: Xerox Corporation
    Inventors: James D. Mayo, James M. Duff, Rina Carlini, Roger E. Gaynor, George Liebermann