Patents by Inventor Vladislav Skorokhod
Vladislav Skorokhod 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: 8097388Abstract: The presently disclosed embodiments are directed to an improved low wear overcoat for an imaging member having a substrate, a charge transport layer, and an overcoat positioned on the charge transport layer, and a process for preparing the same including combining a binder, a hole transport molecule, a melamine formaldehyde crosslinking agent and an acid catalyst dissolved in an alcohol solvent to form an overcoat solution, and subsequently providing the overcoat solution onto the charge transport layer to form an overcoat layer.Type: GrantFiled: March 14, 2008Date of Patent: January 17, 2012Assignee: Xerox CorporationInventors: Matthew A. Heuft, Nan-Xing Hu, Jennifer A. Coggan, Vladislav Skorokhod, Yvan Gagnon, Sarah Kavassalis
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Patent number: 8029958Abstract: The presently disclosed embodiments are directed to an improved low wear overcoat for an imaging member having a substrate, a charge transport layer, and an overcoat layer positioned on the charge transport layer, and a process for preparing the same, where the overcoat layer includes an aromatic polyol binder, a hole transport molecule, and a melamine formaldehyde curing resin.Type: GrantFiled: July 16, 2008Date of Patent: October 4, 2011Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, Vladislav Skorokhod, Yvan Gagnon, Ah-Mee Hor
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Patent number: 8032059Abstract: The presently disclosed embodiments are directed to charging devices which produce a negative corona. The present embodiments pertain to the use of a positive charging device, such as a scorotron, after the erase lamp and before negative charging station in the xerographic cyclic to mitigate the undesirable changes in charge transport layer electrical properties that result from exposure to corona while negatively charging the photoreceptor during latent image formation.Type: GrantFiled: February 27, 2009Date of Patent: October 4, 2011Assignee: Xerox CorporationInventors: Richard Klenkler, Ah-Mee Hor, Vladislav Skorokhod, Johann Junginger
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Patent number: 8021811Abstract: Disclosed is an electrophotographic photoreceptor having a protective overcoat layer including a polyol binder; a hole transport material; a curing agent; and a surface-treated tin oxide particle filler. Also disclosed is a process for forming a photoreceptor that includes providing a photoreceptor substrate; applying a charge generating layer; applying a charge transport layer; and applying a protective overcoating layer over the substrate; such that the protective overcoat layer includes a polyol binder; a hole transport material; a curing agent; and a surface-treated tin oxide particle filler. Also included is a method of forming an image, including the disclosed photoreceptor.Type: GrantFiled: January 23, 2008Date of Patent: September 20, 2011Assignee: Xerox CorporationInventors: Kathy L. De Jong, Yu Qi, Vladislav Skorokhod, Nan-Xing Hu, Johann Junginger, Markus Silvestri, John F. Yanus, Kenny-Tuan Dinh
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Patent number: 8012655Abstract: The presently disclosed embodiments are directed to an imaging member having an outermost layer formulation that includes wax particles which creates a rough surface morphology for the layer and imparts increased scratch resistance, reduced torque, and improved cleaning performance to the layer. In embodiments, the outermost layer is an overcoat layer used for an improved imaging member having a substrate, a charge transport layer, and an overcoat positioned on the charge transport layer.Type: GrantFiled: April 22, 2008Date of Patent: September 6, 2011Assignee: Xerox CorporationInventors: Kathy L. De Jong, Nan-Xing Hu, Yvan Gagnon, Yu Qi, Ah-Mee Hor, Cuong Vong, Vladislav Skorokhod
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Patent number: 7981582Abstract: A toner having a crystalline or semi-crystalline polyester resin, an amorphous resin and a colorant. The toner preferably exhibits a resistivity of at least 1×1011 ohm-cm. A developer may be produced including the toner and optionally a carrier. If a carrier is included, the carrier preferably exhibits a resistivity of greater than 1×107 ohm-cm. An electrophotographic machine includes the toner exhibiting high resistivity.Type: GrantFiled: June 23, 2005Date of Patent: July 19, 2011Assignee: Xerox CorporationInventors: Richard P. N. Veregin, Michael S. Hawkins, Vladislav Skorokhod, Valerie M. Farrugia
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Publication number: 20110086299Abstract: Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising a removable protective outer layer which comprises light-absorbing material which substantially prevents any light absorption by the overcoat layer. Thus, the light-absorbing material reduces the intrinsic light shock suffered by conventional overcoat layers without negatively impacting electrical properties of the overcoat layer while improving print quality.Type: ApplicationFiled: October 13, 2009Publication date: April 14, 2011Applicant: XEROX CORPORATIONInventors: Markus R. Silvestri, Johann Junginger, Vladislav Skorokhod
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Publication number: 20110086300Abstract: Presently disclosed embodiments relate to an improved electrophotographic imaging member or photoreceptor comprising a surface layer on the photoreceptor, where the surface layer comprises secondary electron emitting materials that act as a robust electrically active layer. Photoreceptors incorporating such materials into or on the surface will exhibit an increase photoreceptor life and also a reduction the operating voltage of bias charge roll (BCR) charging systems while maintaining excellent charge uniformity.Type: ApplicationFiled: October 7, 2010Publication date: April 14, 2011Applicant: XEROX CORPORATIONInventors: Gregory McGuire, Vladislav Skorokhod
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Patent number: 7910277Abstract: A method of predicting a Lewis acid-base relative humidity (RH) ratio in a two-component developer comprised of at least a toner and a carrier including selecting a candidate toner, selecting a candidate carrier, and determining the Lewis acid and Lewis base constants for the candidate toner and candidate carrier. In addition, calculating the Lewis acid-base RH ratio wherein the calculated Lewis acid-base RH ratio is related to charge RH ratio.Type: GrantFiled: January 17, 2007Date of Patent: March 22, 2011Assignee: Xerox CorporationInventors: Richard P. N. Veregin, Maria N. V. McDougall, Michael S. Hawkins, Cuong Vong, Vladislav Skorokhod
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Publication number: 20110033798Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. Embodiments pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises healing materials that act as a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced wear and deletions in high humidity conditions. Embodiments also pertain to methods for making the improved electrophotographic imaging member.Type: ApplicationFiled: August 10, 2009Publication date: February 10, 2011Applicant: XEROX CORPORATIONInventors: Woo Soo Kim, Nan-Xing Hu, Vladislav Skorokhod, Cuong Vong, Gregory McGuire
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Patent number: 7862970Abstract: A toner composition includes core particles including a polymeric latex and an optional colorant, and amino-containing polymer particles dispersed on an external surface of the particles.Type: GrantFiled: May 13, 2005Date of Patent: January 4, 2011Assignee: Xerox CorporationInventors: Michael S. Hawkins, Eric M. Strohm, Richard P. N. Veregin, Vladislav Skorokhod, Clive R. Daunton, Robert D. Bayley
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Patent number: 7851116Abstract: Toner including toner particles having a calcium-containing material at least in a surface portion of the toner particle, wherein the toner particles contain calcium in an amount of from 20 ppm to about 300 ppm of calcium by dry weight of the toner. Developer including a carrier and a toner, wherein the toner includes toner particles having a calcium-containing material at least in a surface portion of the toner particles. In an emulsion aggregation process for making toner particles, the toner particles are treated with calcium. The addition of calcium to the toner particles improves toner performance by lowering cohesion and charging, thereby generating an image of high gloss.Type: GrantFiled: October 30, 2006Date of Patent: December 14, 2010Assignee: Xerox CorporationInventors: Richard P. N. Veregin, Allan K. Chen, Cuong Vong, Vladislav Skorokhod, Eric M. Strohm, Michael S. Hawkins, Christine D. Anderson, Richard Fong, Nancy S. Hunt, Vincenzo G. Marcello
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Publication number: 20100221044Abstract: The presently disclosed embodiments are directed to charging devices which produce a negative corona. The present embodiments pertain to the use of a positive charging device, such as a scorotron, after the erase lamp and before negative charging station in the xerographic cyclic to mitigate the undesirable changes in charge transport layer electrical properties that result from exposure to corona while negatively charging the photoreceptor during latent image formation.Type: ApplicationFiled: February 27, 2009Publication date: September 2, 2010Applicant: XEROX CORPORATIONInventors: Richard Klenkler, Ah-Mee Hor, Vladislav Skorokhod, Johann Junginger
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Patent number: 7780774Abstract: A method of making a phase change ink composition includes adding to a device with a stirring element at least one pigment, at least one dispersant and at least one synergist, processing the device at an elevated temperature and at a stirring rate to wet the at least one pigment to obtain an ink concentrate, and mixing the ink concentrate with an ink vehicle to obtain the ink composition. The device may be an extruder, an attritor or the like. The method allows for the reduction in the amount of dispersant to include in the ink.Type: GrantFiled: January 27, 2009Date of Patent: August 24, 2010Assignee: Xerox CorporationInventors: Raymond W. Wong, Marcel P. Breton, James D. Mayo, C. Geoffrey Allen, Vladislav Skorokhod, Edward G. Zwartz, Kimberly D. Nosella, Christine D. Anderson
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Publication number: 20100201612Abstract: Systems and methods are described that facilitate eliminating a need for a raster output scanner (ROS) or laser when generating a latent image on a photoreceptor. An addressable backplane is employed, comprising an array of field effect transistors (e.g., silicon or organic thin film transistors, or TFTs), wherein each TFT corresponds to a single pixel on a charge transport layer on the photoreceptor surface. Latent image formation is performed by forming a surface potential using corona charging, and then directing free charge carriers toward the photoreceptor surface to reduce electrostatic potential in areas that need to be toned. TFTs in the array are individually addressed, or selected, to connect to a common ground, which allows photodischarge to occur only in selected areas (e.g., pixels associated with the selected TFTs).Type: ApplicationFiled: February 6, 2009Publication date: August 12, 2010Applicant: XEROX CORPORATIONInventors: Gregory McGuire, Vladislav Skorokhod, Robert A. Street
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Publication number: 20100201777Abstract: Systems and methods are described that facilitate using TFT control of electronic discharge for surface potential reduction and latent image formation on an imaging member. Corona charging is performed to first create a background surface potential, followed by selective discharge of individual pixels using an array of TFTs to supply free charge carriers to reduce the electrostatic surface potential to nearly zero. This is followed by discharged area development (DAD) to develop the latent image on a print medium (e.g., paper). The described systems and methods do not require a HVPS to drive the backplane; therefore, the TFT matrix is electrostatically decoupled from the developer and other system components in direct contact with the imaging member. Accordingly, known addressing systems may be used to address the TFT array.Type: ApplicationFiled: February 6, 2009Publication date: August 12, 2010Applicant: XEROX CORPORATIONInventors: Vladislav Skorokhod, Gregory McGuire, Robert A. Street
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Publication number: 20100186624Abstract: A method of making a phase change ink composition includes adding to a device with a stirring element at least one pigment, at least one dispersant and at least one synergist, processing the device at an elevated temperature and at a stirring rate to wet the at least one pigment to obtain an ink concentrate, and mixing the ink concentrate with an ink vehicle to obtain the ink composition. The device may be an extruder, an attritor or the like. The method allows for the reduction in the amount of dispersant to include in the ink.Type: ApplicationFiled: January 27, 2009Publication date: July 29, 2010Applicant: XEROX CORPORATIONInventors: Raymond W. WONG, Marcel P. BRETON, James D. MAYO, C. Geoffrey ALLEN, Vladislav SKOROKHOD, Edward G. ZWARTZ, Kimberly D. NOSELLA, Christine D. Anderson
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Patent number: 7713668Abstract: A toner composition having toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant. The gel latex is present in an amount of from about 3 weight percent to about 30 weight percent of the toner composition, the high Tg latex is present in an amount of from about 50 weight percent to about 95 weight percent of the toner composition, the wax is present in an amount of from about 2 weight percent to about 40 weight percent of the toner composition, and the colorant is present in an amount of from about 1 weight percent to about 25 weight percent of the toner composition.Type: GrantFiled: December 13, 2006Date of Patent: May 11, 2010Assignee: Xerox CorporationInventors: Karen A. Moffat, Emily L. Moore, Daryl W. Vanbesien, Shigang S. Qui, Vladislav Skorokhod, Edward G. Zwartz, Juan A. Morales-Tirado, William H. Hollenbaugh, Jr.
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Patent number: 7691552Abstract: A toner having a core with a first latex having a specific glass transition temperature, and further having a shell surrounding the core with a second latex having a specific glass transition temperature, and processes for producing the same.Type: GrantFiled: August 15, 2006Date of Patent: April 6, 2010Assignee: Xerox CorporationInventors: Vincenzo G. Marcello, Dennis A. Mattison, Jr., Steven A. VanScott, Nancy S. Hunt, Cuong Vong, Vladislav Skorokhod, Richard P. N. Veregin, Michael S. Hawkins, Tie Hwee Ng, Daryl W. Vanbesien, Christine Deborah Anderson, Liam S. Cummings, Louis V. Isganitis, Allan Chen
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Patent number: 7662531Abstract: The toner described herein contains toner particles containing polymer, colorant and cross-linked polymer. The cross-linked polymer is incorporated at least in the shell of the toner particles. Incorporating cross-linked polymer in the shell of the toner particles provide bumps in the surface of the toner particles. These bumps can behave as spacers. Such toner can be formed by aggregating at least polymer particles and colorant particles to form core particles; aggregating at least cross-linked polymer particles to the surface of the core particles; and coalescing the resulting particles to form toner particles.Type: GrantFiled: September 19, 2005Date of Patent: February 16, 2010Assignee: Xerox CorporationInventors: Paul J. Gerroir, Daryl W. Vanbesien, Vladislav Skorokhod, Maria N.V. McDougall, Eric Strohm, Edward G. Zwartz