Patents Represented by Attorney E. D. Palazzo
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Patent number: 7687212Abstract: A photoconductor that includes for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and where the photogenerating layer contains at least one charge trapping releaser.Type: GrantFiled: October 9, 2007Date of Patent: March 30, 2010Assignee: Xerox CorporationInventor: Jin Wu
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Patent number: 7560208Abstract: A photoconductor containing a substrate, an undercoat layer thereover comprising a resin mixture of, for example, a polyol resin, and an aminoplast resin, and a polyester, and a metal oxide; a photogenerating layer and at least one, such as 1 to about 4, charge transport layer.Type: GrantFiled: August 1, 2006Date of Patent: July 14, 2009Assignee: Xerox CorporationInventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Francisco J. Lopez
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Patent number: 7479358Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one C-ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and the sum of n plus m (n+m) is from about 1 to about 10, and a thiophosphate.Type: GrantFiled: June 15, 2006Date of Patent: January 20, 2009Assignee: Xerox CorporationInventors: Jin Wu, Kenny-Tuan Dinh, Kathleen M. Carmichael, Michael S. Roetker, Kent J. Evans, Geoffrey M T. Foley, Anthony M. Horgan, Yonn K. Rasmussen, Satchidanand Mishra, Edward F. Grabowski, Liang-Bih Lin, Markus R. Silvestri
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Patent number: 7318986Abstract: A photoconductive imaging member containing a photogenerating layer, and a charge transport layer containing a binder and a suitable polyimide, and more specifically, an amorphous polyimide.Type: GrantFiled: May 11, 2005Date of Patent: January 15, 2008Assignee: Xerox CorporationInventors: Jin Wu, Robert P. Altavela, Linda Ferrarese, Liang-Bih Lin
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Patent number: 7297456Abstract: A member comprised of a photogenerating layer and a charge transport layer, and wherein the charge transport layer is comprised of a charge transport component or components, and a crosslinked polycarbonate polymer of the formula wherein X and Y represent the number of segments.Type: GrantFiled: August 4, 2004Date of Patent: November 20, 2007Assignee: Xerox CorporationInventors: Nan-Xing Hu, Timothy P. Bender, Ah-Mee Hor, H. Bruce Goodbrand, Yvan Gagnon
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Patent number: 6967069Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide dispersed in an in situ formed inorganic/organic network wherein the inorganic component is silica, titania or zirconia, and the organic component is a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain, for example, at least two phenolic groups.Type: GrantFiled: April 9, 2003Date of Patent: November 22, 2005Assignee: Xerox CorporationInventors: Jin Wu, Jennifer Y. Hwang, Liang-Bih Lin, Geoffrey M. T. Foley, John J. Wilbert
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Patent number: 6942954Abstract: A toner process involving the heating a mixture of an acicular magnetite dispersion, a colorant dispersion, a wax dispersion, a first latex containing a crosslinked resin, and a second latex containing a resin free of crosslinking in the presence of a coagulant to provide aggregates, stabilizing the aggregates with a silicate salt dissolved in a base, and further heating the aggregates to provide coalesced toner particles.Type: GrantFiled: June 25, 2003Date of Patent: September 13, 2005Assignee: Xerox CorporationInventors: Raj D. Patel, Michael A. Hopper, Edward G. Zwartz, Cuong Vong, Allan K. Chen
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Patent number: 6936396Abstract: A toner process comprised of heating a mixture of an acicular magnetite dispersion, a colorant dispersion, a wax dispersion, a first latex containing a crosslinked resin, a second latex containing a resin substantially free of crosslinking, a coagulant and a silica, and wherein the toner resulting possesses a shape factor of from about 120 to about 150.Type: GrantFiled: June 25, 2003Date of Patent: August 30, 2005Assignee: Xerox CorporationInventor: Raj D. Patel
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Patent number: 6875548Abstract: A photoconductive imaging member including an optional supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said layer includes a charge transport component and a polysiloxane.Type: GrantFiled: February 19, 2003Date of Patent: April 5, 2005Assignee: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, John F. Yanus, Dale S. Renfer, Markus R. Silvestri, Cindy C. Chen, Dennis J. Prosser, Susan M. VanDusen, Lanhui Zhang, Sean X. Pan
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Patent number: 6850725Abstract: An apparatus comprised of a charging component, a development component, a transport component, a photoconductive component, and a fusing component, and wherein the development component contains a toner comprising at least one binder in an optional amount of from about 85 to about 99 percent by weight, at least one colorant in an optional amount of from about 0.5 to about 15 percent by weight, and calcium stearate in an optional amount of from about 0.05 to about 2 percent by weight and wherein following triboelectric contact with carrier particles, the toner has a charge Q measured in femtocoulombs per particle diameter D measured in microns (Q/D) of from about ?0.1 to about ?1 fC/?m with a variation during development of from about 0 to about 0.25 fC/?m and wherein the distribution is substantially unimodal and possesses a peak width of from about 0.1 fC/?m to about 0.Type: GrantFiled: June 18, 2004Date of Patent: February 1, 2005Assignee: Xerox CorporationInventors: Scott M. Silence, William H. Hollenbaugh, Jr., Thomas R. Pickering, Amy L. Stamp, Roger N. Ciccarelli, Denise R. Bayley, Samuel Kaplan, Alexander N. Klymachyov, John S. Walters, Padam K. Angra
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Patent number: 6849371Abstract: A surfactant-free toner process including coalescing by heating in water a coagulant, a polyester resin emulsion, a wax emulsion stabilized with said polyester emulsion and a colorant dispersion stabilized by said polyester emulsion.Type: GrantFiled: June 18, 2002Date of Patent: February 1, 2005Assignee: Xerox CorporationInventors: Guerino G. Sacripante, Enno E. Agur
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Patent number: 6803166Abstract: A process comprising heating a latex and a colorant, and optionally a wax, and wherein the latex contains a polymer with a Mz value of from about 60,000 to about 150,000.Type: GrantFiled: February 18, 2003Date of Patent: October 12, 2004Assignee: Xerox CorporationInventors: Chieh-Min Cheng, Emily L. Moore, Amy A. Albright, Tie Hwee Ng
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Patent number: 6773830Abstract: A device containing a number of layers with one of the layers containing a green emitting component.Type: GrantFiled: November 8, 2001Date of Patent: August 10, 2004Assignee: Xerox CorporationInventors: Hany Aziz, Cuong Vong, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
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Patent number: 6754466Abstract: A toner removal apparatus for a reproducing machine has a cylindrical brush mounted for rotation in a closely fitting housing. The housing has an open side confronting a moving photoreceptor. Brush fibers extend through the housing open side into interfering contact with the photoreceptor and sweep toner therefrom. A slot in the housing parallel to the brush is connected to a vacuum source to draw air into the housing open side, through the brush fibers, and out the housing slot. First and second parallel bars are mounted on opposite sides of the housing slot and extend into contact with the brush fibers. The first bar compresses and then releases the brush fibers to flick toner therefrom. The second bar extends into the housing a lesser amount than the first bar and contacts the brush fibers without compression thereof, thereby providing an air seal, so that all of the air flows through the brush fibers.Type: GrantFiled: January 8, 2003Date of Patent: June 22, 2004Assignee: Xerox CorporationInventor: Robert S. Pozniakas
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Patent number: 6753897Abstract: Uniformity of light output from an LED printbar is achieved by current sensing or image sensing of auxiliary LEDs on the LED printbar. A photodetector measures the light output from the auxiliary LEDs and a comparator will compare the auxiliary LED data to determine if the entire LED printbar has to be compensated to make the light output more uniform.Type: GrantFiled: December 26, 2001Date of Patent: June 22, 2004Assignee: Xerox CorporationInventor: Shahriar Vazan
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Patent number: 6740429Abstract: An organic light emitting device containing (i) an anode or a first electrode; (ii) a hole transport layer containing, for example, a mixture of a porphyrin and a hole transport material (iii) a mixed region containing a mixture of (1) a hole transport material, and (2) an electron transport material; (iv) a cathode or second electrode, and wherein the organic light emitting device may further contain at least one of (v) an electron transport region interposed between the mixed region and the cathode; and (vi) a thermal protective element coated on one of the anode and cathode.Type: GrantFiled: November 8, 2001Date of Patent: May 25, 2004Assignee: Xerox CorporationInventors: Hany Aziz, Cuong Vong, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
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Patent number: 6730417Abstract: A new class of conjugated organic polymers or copolymers comprising a triazine group. This class of polymers or copolymers may be used in organic electroluminescent (EL) devices.Type: GrantFiled: January 29, 2002Date of Patent: May 4, 2004Assignee: Xerox CorporationInventors: Nan-Xing Hu, Zoran D. Popovic, Guerino G. Sacripante
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Patent number: 6680153Abstract: A composition comprised of resin and colorant, and wherein the colorant is stabilized with an ultra-violet stabilizer.Type: GrantFiled: May 21, 2002Date of Patent: January 20, 2004Assignee: Xerox CorporationInventors: Scott M. Silence, Edward J. Gutman, Thomas R. Hoffend
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Patent number: 6673505Abstract: A process for the preparation of a toner by mixing a colorant, a latex, optionally a wax and a polyamine salt coagulant to form toner size aggregates, wherein the polyamine salt is then neutralized or converted to an amide or hydrolyzed to an acid by the introduction of a base followed by a pH reduction with an acid to enable rapid coalescence or fusion of the aggregates.Type: GrantFiled: March 25, 2002Date of Patent: January 6, 2004Assignee: Xerox CorporationInventors: Lu Jiang, Armin R. Volkel, Chieh-Min Cheng, Michael A. Hopper, Walter Mychajlowskij, Raj D. Patel
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Patent number: 6670054Abstract: An electroluminescent device including a first electrode, a second electrode, and situated between the electrodes a carbazole layer of the formula wherein R1, R2, R3, and R4 are independently selected from the group consisting of a hydrocarbyl, and wherein Ar is an aryl.Type: GrantFiled: July 25, 2002Date of Patent: December 30, 2003Assignee: Xerox CorporationInventors: Nan-Xing Hu, Hany Aziz, Zoran D. Popovic, Ah-Mee Hor