Patents Represented by Attorney Eugene O. Palazzo
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Patent number: 6825513Abstract: A high power MOSFET semiconductor having a high breakdown voltage. The new power device concept that reaches an area of a lower specific on-resistance, higher breakdown voltage and reduced device silicon area. This device architecture is built on the concepts of charge compensation in the drift region of the device. Where, the doping of the vertical drift region is increased by one order of magnitude. To counterbalance the added charges, fine-structured wells of opposite doping type to the drift region are introduced as part of the device structure. The charge compensation wells do not contribute to the on-state current conduction, therefore, this novel new generation of high voltage device architecture breaks the limit line of silicon. This architecture may extend to higher material resistivity and larger geometry to increase the voltage to 1kv plus.Type: GrantFiled: September 27, 2002Date of Patent: November 30, 2004Assignee: Xerox CorporationInventor: Abdul M. ElHatem
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Patent number: 6821643Abstract: An electroluminescent device comprised of an anode and a cathode, and situated therebetween said anode and said cathode at least one electron transport layer comprised of a triazine of the formula wherein A is a monovalent or a multi-valent aromatic group which contains at least two conjugate-linked or at least two fused aromatic rings; Ar1 and Ar2 are each independently aryl or aliphatic; and m represents the number of repeating segments.Type: GrantFiled: January 21, 2000Date of Patent: November 23, 2004Assignee: Xerox CorporationInventors: Nan-Xing Hu, Mohammad Esteghamatian, Zoran D. Popovic, Beng S. Ong, Ah-Mee Hor
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Patent number: 6818723Abstract: A sulfonated polyester-siloxane resin derived, for example, from at least one organic diol monomer, at least one organic diacid monomer or at least diester monomer, at least one carbinol or carboxy terminated polydimethylsiloxane, and at least one ion salt of a sulfonated difunctional monomer.Type: GrantFiled: June 12, 2002Date of Patent: November 16, 2004Assignee: Xerox CorporationInventor: Guerino G. Sacripante
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Patent number: 6815136Abstract: A process including: dispersing a first liquid developer concentrate comprising a resin, a colorant, and a liquid developer reconstitution compound, in a carrier liquid, into additional carrier liquid to form a second liquid developer; depositing the second liquid developer onto a liquid receiver member to form a developer cake; developing an image with the developer cake; reclaiming undeveloped developer cake from the cake bearing liquid receiver member; and redispersing the reclaimed undeveloped developer cake in the second developer liquid.Type: GrantFiled: February 28, 2000Date of Patent: November 9, 2004Assignee: Xerox CorporationInventors: Weizhong Zhao, Thomas W. Smith, David H. Pan, William M. Prest, Jr., Samuel Kaplan
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Patent number: 6811896Abstract: An organic light emitting device (OLED) has a thick (100 to 250 nanometers) porphyrin buffer layer between the anode and the luminescent region. The thick porphyrin buffer layer in the OLED results in a small increase in device operating voltage, reduces the possibility of OLED shorting and can improve color purity in blue emitting OLEDs due to its significant optical absorption in the red range.Type: GrantFiled: July 29, 2002Date of Patent: November 2, 2004Assignee: Xerox CorporationInventors: Hany Aziz, Zoran D. Popovic, Nan-Xing Hu, Ah-Mee Hor
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Patent number: 6800411Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and a charge transport layer containing a binder and a compound containing at least two (methyl)acrylates.Type: GrantFiled: February 19, 2003Date of Patent: October 5, 2004Assignee: Xerox CorporationInventors: Yuhua Tong, Jin Wu, Liang-Bih Lin, John F. Yanus
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Patent number: 6797445Abstract: A flexible electrophotographic imaging member comprising a supporting substrate, at least one imaging layer on one side of the supporting substrate, a charge blocking layer, an optional adhesive layer, a charge-generating layer, a charge transporting layer, a seam overcoat layer comprising a coating solution of a co-polyester resin and having a thickness of from about 2 to about 4 micrometers and having a width of from about 2 to about 10 millimeters and wherein said co-polyester resin is present in an amount of from about 2 to about 40 percent by weight based on the total weight of said overcoat layer, and a binder. The imaging member exhibits an excellent life cycle; excellent wear resistance, excellent electrical performance, and outstanding print quality.Type: GrantFiled: December 16, 2002Date of Patent: September 28, 2004Assignee: Xerox CorporationInventors: David J. Maty, John A. Bergfjord, Sr., Stephan V. Drappel
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Patent number: 6770410Abstract: An imaging member including, for example, a substrate, a charge blocking layer, an optional adhesive layer, a charge generating layer, a charge transporting layer comprising a charge transport component and a polymer binder substantially free of low molecular weight fractions.Type: GrantFiled: October 31, 2002Date of Patent: August 3, 2004Assignee: Xerox CorporationInventors: Robert C. U. Yu, Timothy J. Fuller, Kathleen M. Carmichael
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Patent number: 6733946Abstract: A method for providing three dimensional optical memory storage for computers. The method comprises subjecting a nanocomposite to irradiation. The nanocomposite comprises a matrix of particles of a liquid core resin within an inner shell resin and an outer shell resin. The inner shell resin retains the liquid core resin while the outer shell resin forms a continuous phase of the matrix. The particles of core resin contain at least one photosensitive compound and are in an array in the matrix. The continuous phase is substantially free of photosensitive compound. The irradiation may be a single beam of irradiation selectively focused on individual particles in the array to effect photobleaching of individual particles or a two-photon irradiation of a wavelength to effect photobleaching.Type: GrantFiled: March 9, 2001Date of Patent: May 11, 2004Assignees: Xerox Corporation, University of TorontoInventors: Eugenia Kumacheva, Olga Kalinina, Robert John Dwayne Miller, Bradley John Siwick, James Harry Sharp, Jaan Noolandi
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Patent number: 6664018Abstract: A method of forming an aqueous dispersion of particles of zinc stearate includes the steps of forming a mixture of at least one surfactant and water, heating the mixture to a temperature of from about 40° C. to less than a melting temperature of zinc stearate, adding a metal-containing stearate to the mixture under agitation, adding to the mixture a solution of a zinc salt in water, whereby upon inclusion of both the metal-containing stearate and the zinc salt in the mixture, the zinc salt reacts with the metal-containing stearate to form the particles of zinc stearate, continuing the heating and agitation following completion of the latter of the adding of the solution of zinc salt or the adding of the metal-containing stearate to continue the reaction, and cooling to obtain the aqueous dispersion of particles of zinc stearate. The method forms a stable aqueous dispersion of nanometer sized zinc stearate particles particularly useful in coating toner particles.Type: GrantFiled: April 23, 2002Date of Patent: December 16, 2003Assignee: Xerox CorporationInventors: Allan K. Chen, Tie Hwee Ng, Lu Jiang, Kimberly D. Nosella, Paul J. Gerroir, Michael Damato
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Patent number: 6614175Abstract: An organic light emitting device which contains a mixed region of a hole transport, an electron transport, and an organic luminescent component. The mixed region can be situated between two electrodes, one of which includes a thermal protective layer. Further, the device contains a hole transport region situated between the mixed region and an anode electrode, and an electron transport layer situated between the mixed region and a cathode electrode.Type: GrantFiled: January 26, 2001Date of Patent: September 2, 2003Assignee: Xerox CorporationInventors: Hany Aziz, Zoran D. Popovic, Nan-Xing Hu
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Patent number: 6596450Abstract: A charge transport composition containing aromatic amines with crosslinkable silanes as represented by the formula wherein A represents a hole transporting aromatic tertiary amine moiety; L1 and L2 represents charge such as a divalent group; X represents oxygen or an imino group; Y represents an alkoxy group, or a halide atom; R is a hydrogen atom or an alkyl group; and n represents the number of repeating segments.Type: GrantFiled: September 10, 2001Date of Patent: July 22, 2003Assignee: Xerox CorporationInventors: Nan-Xing Hu, Yu Qi, Ping Liu
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Patent number: 6574034Abstract: A method for displaying an image with an electrophoretic display device that includes a multiplicity of individual reservoirs, each containing an electrophoretic display fluid, located between two conductive film substrates, at least one of which is transparent, includes appropriately applying an electric field and a magnetic force to a selected individual reservoir in a manner to cause either a first set of particles or a second set of particles of the display fluid to be displayed. The first set of particles exhibit a color different from and contrasting to a color of the second set of particles, and also preferably a different charging property.Type: GrantFiled: January 16, 2002Date of Patent: June 3, 2003Assignee: Xerox CorporationInventors: Pinyen Lin, David H. Pan, Chieh-Min Cheng, Adam Bush
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Patent number: 6566025Abstract: A toner composition includes toner particles formed of a resin and a colorant; and one or more external additives, at least one of the external additives including polymeric particles, applied to a surface of the toner particles. The polymeric particles include a polymer selected from polymethylmethacrylate, modified polymethylmethacrylate, halogenated polymethylmethacrylates, and mixtures thereof.Type: GrantFiled: January 16, 2002Date of Patent: May 20, 2003Assignee: Xerox CorporationInventors: Mary L. McStravick, Mark James Hirsch, Thomas W. Pike, Ronald J. Koch
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Patent number: 6542708Abstract: A method of replenishing developer, wherein the replenisher contains carrier particles coated with zinc stearate.Type: GrantFiled: September 28, 2001Date of Patent: April 1, 2003Assignee: Xerox CorporationInventor: Thomas J. Budny
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Patent number: 6529313Abstract: An electrophoretic display liquid composition for use in an electrophoretic display device that has a multiplicity of individual reservoirs, each containing the liquid, contains one or at least two sets of particles dispersed in a transparent and/or colored liquid system. The at least two sets of particles exhibit different, contrasting color and different charging properties from each other, while in the one particle system, the particles exhibit a different, contrasting color from the colored liquid. In all embodiments, at least one of the sets of particles are particles with adjustable morphology made from emulsion/aggregation process. The morphology of the particles is controlled to be from grape, cauliflower, raspberry, or potato up to substantially perfect spheres.Type: GrantFiled: January 16, 2002Date of Patent: March 4, 2003Assignee: Xerox CorporationInventors: Pinyen Lin, David H. Pan, Chieh-Min Cheng, Adam Bush, James R. Combes, Pudupadi R. Sundararajan, Alison Way, Paul J. Gerroir, Naveen Chopra, Paul F. Smith, Rina Carlini
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Patent number: 6503677Abstract: An emulsion aggregation toner particularly adapted for use in hybrid scavengeless development includes toner particles of polymer binder, colorant and a surface additive package containing at least one additive negatively chargeable to a carrier and at least one additive positively chargeable to the carrier. The toner is able to exhibit high stable triboelectric charging ability, and substantially eliminates charge through and slow admix in a developer employing the toner.Type: GrantFiled: July 10, 2001Date of Patent: January 7, 2003Assignee: Xerox CorporationInventors: Edward J. Gutman, Bernard Grushkin, John G. Ruhland
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Patent number: 6498567Abstract: A system and remote control device that controls an appliance, and obtains a desired function of the appliance, by invoking a remote procedure call in a remote server which will thereby actually control the appliance. The remote control device comprises a sensor; sensor responsive means for capturing information provided by the sensor, wherein the captured information at least contains parameters representative of the identification of the appliance, user-profile parameters, parameters representative of the address of the remote server, and a function name indicating the function to be performed by the appliance; marshalling means for encoding the captured information and for packaging the captured information into data in a remote procedure call format; and a transmitter for establishing a communication protocol with the remote server in order to transmit the packaged data to the remote server so that the remote server may execute the remote procedure call.Type: GrantFiled: December 20, 1999Date of Patent: December 24, 2002Assignee: Xerox CorporationInventors: Gregory Grefenstette, Francois Pacull, Max Copperman
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Patent number: 6465856Abstract: A microstructure that may be used as an electrical connection in a microfabricated electro-mechanical system (MEMS) apparatus. The microstructure may have one or more isolatable electrical connections for signal transmission. The microstructure allows a MEMS apparatus to shield signal transmissions from the effects of electromagnetic interference or conductive fluids.Type: GrantFiled: March 19, 2001Date of Patent: October 15, 2002Assignee: Xerox CorporationInventors: Peter M. Gulvin, Jingkuang Chen
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Patent number: 6456815Abstract: The present invention relates to improved methods of coating donor members with waterbome coatings, wherein a resin, a pigment, and water are combined in proportions effective to provide a donor member precursor composition; the donor member precursor composition is subjected to high pressure communition to provide a donor member conductive coating composition; and the donor member coating composition is coated onto a substrate. The present method advantageously provides a donor member coating which is substantially free of air pockets or defects. In preferred embodiments the resin is a phenolic resin, preferably a waterborne phenolic resin, such as a phenol-formaldehyde resole, and in other preferred embodiments the pigment is selected from the group consisting of carbon black, graphite, magnetite, nigrosine, and combinations thereof.Type: GrantFiled: November 28, 2000Date of Patent: September 24, 2002Assignee: Xerox CorporationInventors: Peter G. Odell, Thomas Thomson, Jas Paul S. Dhillon, Yvonne J. M. Groot, Michael F. Zona, Richard D. Hunt