Patents by Inventor Hadi K. Mahabadi
Hadi K. Mahabadi 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).
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Patent number: 6660444Abstract: Carrier comprised of a core, a number of the pores thereof containing a polymer, and thereover a coating.Type: GrantFiled: January 10, 2003Date of Patent: December 9, 2003Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Publication number: 20030104303Abstract: Carrier comprised of a core, a number of the pores thereof containing a polymer, and thereover a coating.Type: ApplicationFiled: January 10, 2003Publication date: June 5, 2003Applicant: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Patent number: 6528225Abstract: Carrier comprised of a core, a number of the pores thereof containing a polymer, and thereover a coating.Type: GrantFiled: March 9, 1998Date of Patent: March 4, 2003Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Patent number: 6476219Abstract: Disclosed is a process for preparing a colorant of the formula wherein M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M, which comprises (a) reacting 3-n-pentadecylphenol with 4-nitrophthalonitrile in the presence of a base to form an alkylarylether adduct of phthalonitrile; and (b) reacting the alkylarylether adduct of phthalonitrile with either (i) a metal compound, or (ii) an ammonia-releasing compound in the presence of an alkanolamine solvent, or (iii) mixtures of (i) and (ii), to form the colorant.Type: GrantFiled: February 8, 2002Date of Patent: November 5, 2002Assignee: Xerox CorporationInventors: James M. Duff, James D. Mayo, Roger E. Gaynor, Jeffrey H. Banning, Michael B. Meinhardt, Randall R. Bridgeman, Nan-Xing Hu, Carol A. Jennings, Marko D. Saban, Paul F. Smith, Hadi K. Mahabadi
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Patent number: 6355194Abstract: A process for the preparation of microsynthetic carrier comprising the melting of a mixture of binder resin, magnetic component, colorant and optionally charge control additive, thereby forming a polymer melt, and mixing said mixture in a melt mixing device, cooling and pelletizing said mixture, and thereafter grinding and classifying said pellets.Type: GrantFiled: March 22, 1999Date of Patent: March 12, 2002Assignee: Xerox CorporationInventors: Enno E. Agur, Hadi K. Mahabadi, Sheau V. Kao, Gerald R. Allison, John A. Creatura
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Patent number: 6322946Abstract: Toner particles may be produced using a semisuspension polymerization process, which includes: (a) providing a mixture of a partially polymerized monomer or comonomers near the onset of the gel-effect; (b) forming a suspension of the partially polymerized monomer or comonomers; and (c) suspension polymerizing the partially polymerized monomer or comonomers while slowly adding a second monomer or comonomers in a starved feed manner. The process may be used to produce toner particles having varied particle properties, and having a morphology ranging from core-shell and inverted core-shell microcapsules to pseudo core-shell microcapsules and to polyblend composites having a low molecular weight phase dispersed in a high molecular weight matrix.Type: GrantFiled: August 31, 1994Date of Patent: November 27, 2001Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Michael F. Cunningham, Heather M. Wright
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Patent number: 6132918Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.Type: GrantFiled: March 29, 2000Date of Patent: October 17, 2000Assignee: Xerox CorporationInventors: Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
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Patent number: 6124409Abstract: Disclosed is a process for preparing copolymers which comprises, in the order stated: (1) adding monomers containing unsaturated carbon-to-carbon bonds, a first polymerization initiator, a second polymerization initiator, and a solvent to a reaction vessel; (2) purging the resulting solution with an inert gas; (3) sealing the reaction vessel and pressurizing it by addition of an inert gas to a pressure of from about 20 to about 600 kilopascals over ambient atmospheric pressure; (4) maintaining the temperature within the pressurized reaction vessel at a temperature of from about 50 to about 100.degree. C. for a period of from about 60 to about 300 minutes; (5) thereafter maintaining the temperature within the pressurized reaction vessel at a temperature of from about 80 to about 115.degree. C.Type: GrantFiled: August 12, 1992Date of Patent: September 26, 2000Assignee: Xerox CorporationInventors: T. Hwee Ng, Hadi K. Mahabadi, Man C. Tam, Gregory J. Kovacs, Eric M. Peters, Rafik O. Loutfy
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Patent number: 6093770Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.Type: GrantFiled: February 2, 1998Date of Patent: July 25, 2000Assignee: Xerox CorporationInventors: Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
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Patent number: 6057409Abstract: A process for the preparation of carrier powder polymer coatings which comprises the supercritical polymerization of two monomers and surfactant in a supercritical medium.Type: GrantFiled: April 3, 1995Date of Patent: May 2, 2000Assignee: Xerox CorporationInventors: Michael F. Cunningham, Hadi K. Mahabadi
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Patent number: 5998076Abstract: Carrier comprised of a hard magnetic core, the pores thereof containing polymer, and thereover s coating.Type: GrantFiled: March 9, 1998Date of Patent: December 7, 1999Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Patent number: 5958302Abstract: A process for the preparation of conductive polymers which comprises (a) mixing at least one monomer with at least one conductive component, solvent, at least one polymerization initiator, and an optional chain transfer component; (b) effecting solution polymerization by heating; (c) removing said solvent by azeotropic distillation in an aqueous phase to generate a mixture of polymer and conductive component; (d) drying and grinding the resulting mixture; thereafter dissolving the product resulting in at least one monomer, at least one initiator, and at least one crosslinking component, and an optional chain transfer agent to form an organic phase; (e) mixing said organic phase with a second aqueous phase comprised of water, stabilizer, and an alkali halide; (f) polymerizing the resulting suspension by heating; and (g) subsequently optionally washing and drying the polymeric product, and which product is comprised of polymer and conductive component dispersed therein.Type: GrantFiled: June 19, 1998Date of Patent: September 28, 1999Assignee: Xerox CorporationInventors: Michael F. Cunningham, George Liebermann, Hadi K. Mahabadi, Daniel M. McNeil, Michael S. Hawkins, Thomas E. Enright, Aron J. Cogswell
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Patent number: 5847030Abstract: A process for the preparation of polymer latex particles by conducting a pre-reaction emulsification with monomer, polar comonomer, water, surfactant, chain transfer agent, and initiator; and which pre-reaction emulsification is effected at a low temperature of from about 3.degree. C. to about 35.degree. C., for example, and thereafter, effecting emulsion polymerization by heating the aforementioned emulsified mixture in a reactor at a temperature of from about 25.degree. C. to about 125.degree. C. The aforementioned reactor contents are retained at this temperature, that is 25.degree. C. to 125.degree. C. for an effective time period. Thereafter, the reaction mixture is cooled.Type: GrantFiled: August 2, 1996Date of Patent: December 8, 1998Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Grazyna E. Kmiecik-Lawrynowicz, T. Hwee Ng
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Patent number: 5807506Abstract: A process for the preparation of conductive polymers which comprises (a) mixing at least one monomer with at least one conductive component, solvent, at least one polymerization initiator, and an optional chain transfer component; (b) effecting solution polymerization by heating; (c) removing said solvent by azeotropic distillation in an aqueous phase to generate a mixture of polymer and conductive component; (d) drying and grinding the resulting mixture; thereafter dissolving the product resulting in at least one monomer, at least one initiator, and at least one crosslinking component, and an optional chain transfer agent to form an organic phase; (e) mixing said organic phase with a second aqueous phase comprised of water, stabilizer, and an alkali halide; (f) polymerizing the resulting suspension by heating; and (g) subsequently optionally washing and drying the polymeric product, and which product is comprised of polymer and conductive component dispersed therein.Type: GrantFiled: April 1, 1997Date of Patent: September 15, 1998Assignee: Xerox CorporationInventors: Michael F. Cunningham, George Liebermann, Hadi K. Mahabadi, Daniel M. McNeil, Michael S. Hawkins, Thomas E. Enright, Aron J. Cogswell
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Patent number: 5725987Abstract: A process which comprises heating at a temperature of from about 31.degree. C. to about 200.degree. C. a mixture of supercritical carbon dioxide, metal or metal oxide, and a surface treating component, optionally removing carbon dioxide, and optionally cooling.Type: GrantFiled: November 1, 1996Date of Patent: March 10, 1998Assignee: Xerox CorporationInventors: James R. Combes, Hadi K. Mahabadi, Carl P. Tripp
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Patent number: 5714299Abstract: A process which comprises heating at a temperature of from about -60.degree. to about 31.degree. C. a mixture of liquid carbon dioxide, metal or metal oxide, and a surface treating component, and optionally removing carbon dioxide.Type: GrantFiled: November 4, 1996Date of Patent: February 3, 1998Assignee: Xerox CorporationInventors: James R. Combes, Hadi K. Mahabadi, Carl P. Tripp
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Patent number: 5601960Abstract: A process comprising:(a) reactive melt mixing of a base resin with a chemical initiator and crosslinking of said base resin to enable a highly crosslinked precursor resin, said highly crosslinked precursor resin being substantially free of sol, and comprising uncrosslinked portions and crosslinked portions, said crosslinked portions comprised of high density crosslinked microgel particles; and(b) accomplishing dilution by melt mixing said highly crosslinked precursor resin of (a) with a base resin to form a partially crosslinked toner resin, said toner resin being substantially free of sol, and comprising linear uncrosslinked portions and crosslinked portions, said crosslinked portions comprised essentially of high density crosslinked microgel particles, wherein said microgel particles are present in an amount of from about 1 to about 45 percent by weight of said toner resin.Type: GrantFiled: November 13, 1995Date of Patent: February 11, 1997Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, T. Brian McAneney, Sheau V. Kao, Gerald R. Allison, Michael S. Hawkins, Bernard Grushkin, J. Stephen Kittelberger, Joo T. Chung, William H. Hollenbaugh, Jr.
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Patent number: 5575954Abstract: A process for the preparation of conductive polymeric particles with linear and crosslinked portions, which comprises mixing a monomer with at least one conductive filler, solvent, at least one polymerization initiator, and a chain transfer component; effecting solution polymerization by heating until from about 80 to about 100 weight percent of the monomer has been polymerized; drying the mixture by removing the solvent to yield an intimate blend of polymer with conductive filler; dispersing the aforementioned blend of polymer and conductive filler in at least one monomer with at least one polymerization initiator, a crosslinking agent and a chain transfer agent to form an organic phase; dispersing the resulting organic phase mixture in water containing a stabilizing component to obtain a suspension of particles with an average volume diameter of from about 0.05 to about 5 microns in water; polymerizing the resulting suspension by heating; and subsequently optionally washing and drying the polymeric product.Type: GrantFiled: October 23, 1995Date of Patent: November 19, 1996Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Denise Y. Wright, Michael F. Cunningham, John A. Creatura
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Patent number: 5571655Abstract: Low fix temperature toners are fabricated by a two step melt mixing and reactive melt mixing process wherein there is initially prepared, for example, using a melt mixing device, a composite of pigment and resin, followed by crosslinking of the resin component at high temperature and high shear to produce a partially crosslinked toner with substantially no unpigmented gel domains. The toners are particularly suitable for high speed fusing, show excellent offset resistance and wide fusing latitude, and superior vinyl offset properties.Type: GrantFiled: April 17, 1995Date of Patent: November 5, 1996Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Michael S. Hawkins, Gerald R. Allison, Sheau V. Kao, Paul J. Gerroir, Nam S. Ro, Enno E. Agur
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Patent number: H1839Abstract: A process for the preparation of toner additive wax particles which comprises the micronization of said particles from a supercritical solution.Type: GrantFiled: April 17, 1997Date of Patent: February 1, 2000Assignee: Xerox CorporationInventors: James R. Combes, Samir Kumar, Lewis S. Smith, Hadi K. Mahabadi, Peter G. Odell