Patents by Inventor Dale Renfer
Dale Renfer 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: 7344809Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: GrantFiled: November 16, 2006Date of Patent: March 18, 2008Assignee: Xerox CorporationInventors: Anthony M. Horgan, Robert C. U. Yu, Satchidanand Mishra, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie, Houy Jen Yuh, Timothy J. Fuller, John F. Yanus, Markus R. Silvestri, Yuhua Tong, Dale Renfer, Kenny-Tuan Tran Dinh, Geoffrey M.T. Foley
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Publication number: 20080014518Abstract: The presently disclosed embodiments are directed to an improved 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 making the same including combining a resin having a reactive group selected from the group consisting of hydroxyl, carboxylic acid and amide groups, a melamine formaldehyde crosslinking agent, a formaldehyde scavenger, an acid catalyst, and an alcohol-soluble charge transporting molecule to form an overcoat solution, and subsequently providing the overcoat solution onto the charge transport layer to form an overcoat layer.Type: ApplicationFiled: September 13, 2007Publication date: January 17, 2008Applicant: XEROX CORPORATIONInventors: John Yanus, Kenny-tuan Dinh, Jin Wu, Dale Renfer
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Publication number: 20080003513Abstract: The presently disclosed embodiments are directed to an improved 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 making the same including combining a resin having a reactive group selected from the group consisting of hydroxyl, carboxylic acid and amide groups, a melamine formaldehyde crosslinking agent, a crosslinkable fluoro additive, an acid catalyst, and a crosslinkable, alcohol-soluble charge transport molecule to form an overcoat solution, and subsequently providing the overcoat solution onto the charge transport layer to form an overcoat layer.Type: ApplicationFiled: September 13, 2007Publication date: January 3, 2008Applicant: XEROX CORPORATIONInventors: John Yanus, Kenny-tuan Dinh, Jin Wu, Dale Renfer
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Publication number: 20070254226Abstract: An imaging member is disclosed with a charge transport layer comprising a terphenyl diamine having the structure of Formula (I): wherein R1 is a methyl group (—CH3) in the ortho, meta, or para position and R2 is a butyl group (—C4H9).Type: ApplicationFiled: July 17, 2006Publication date: November 1, 2007Inventors: John E. Yanus, Markus Silvestri, Dale Renfer, Kenny-tuan Dinh, M. John Hinckel, H. Bruce Goodbrand, Timothy P. Bender
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Publication number: 20070196752Abstract: An imaging member with a unique overcoat composition adapted for forming protective, scratch-resistant overcoats is disclosed. The overcoat composition comprises a binder component that includes particular proportions of a acrylated polyol and propylene glycol. The overcoat composition also comprises a transport agent and a crosslinking agent.Type: ApplicationFiled: February 22, 2006Publication date: August 23, 2007Inventors: Kenny-Tuan Dinh, Dale Renfer, Kendra Giza, Michael Mehan, Susan Vandusen, Markus Silvestri, John Yanus
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Publication number: 20070134573Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, a charge transport layer, and an overcoating layer, where the overcoating layer includes a terphenyl arylamine dissolved or molecularly dispersed in a polymer binder.Type: ApplicationFiled: December 13, 2005Publication date: June 14, 2007Applicant: XEROX CORPORATIONInventors: John Yanus, Kenny-Tuan Dinh, Markus Silvestri, Yuhua Tong, Dale Renfer, T. Freeman, M. Hinckel
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Publication number: 20070092813Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: ApplicationFiled: November 16, 2006Publication date: April 26, 2007Inventors: Anthony Horgan, Robert Yu, Satchidanand Mishra, Richard Post, Edward Grabowski, Kathleen Carmichael, John Lambie, Houy Yuh, Timothy Fuller, John Yanus, Markus Silvestri, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Geoffrey Foley
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Publication number: 20060291877Abstract: A method for determining the approximate surface conductivity of a photoreceptor surface. The method involves forming a latent image of a series of lines of different widths on the surface, developing the image, and then printing the image. Based on which lines print, the surface conductivity can be computed once the developability of isolated lines is established through a calibration procedure.Type: ApplicationFiled: June 22, 2005Publication date: December 28, 2006Inventors: Markus Silvestri, Kenny-Tuan Dinh, Surendar Jeyadev, Gary Batt, Dale Renfer
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Patent number: 7125633Abstract: An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: GrantFiled: December 12, 2003Date of Patent: October 24, 2006Assignee: Xerox CorporationInventors: Satchidanand Mishra, Houy Jen Yuh, Anthony M. Horgan, Markus R. Silvestri, Robert C. Yu, Yuh Tong, Dale Renfer, Kenny-tuan Dinh, Geoff Foley, Jack Yanus, Timothy Fuller
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Publication number: 20060099527Abstract: A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile.Type: ApplicationFiled: December 14, 2005Publication date: May 11, 2006Inventors: Timothy Fuller, Helen Cherniack, Damodar Pai, Markus Silvestri, John Yanus, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Merlin Scharfe, Steven Sterling
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Publication number: 20060063080Abstract: A charge transport layer composition for a photoreceptor includes at least a binder, at least one arylamine charge transport material, e.g., N,N?-diphenyl-N,N?-bis(3-methylphenyl)-(2,2?-biphenyl)-4,4?-diamine, and at least one polymer containing carboxylic acid groups or groups capable of forming carboxylic acid groups. The charge transport layer forms a layer of photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.Type: ApplicationFiled: September 21, 2004Publication date: March 23, 2006Applicant: XEROX CORPORATIONInventors: Yuhua Tong, Kenny-Tuan Dinh, Markus Silvestri, Michael Zak, John Yanus, Min-Hong Fu, David Skinner, Kathleen Carmichael, Colleen Helbig, Dale Renfer, John Bergfjord, Susan Van Dusen, Anthony Horgan, Jin Wu, Steven Sterling
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Publication number: 20060014089Abstract: A charge transport layer composition for a photoreceptor includes at least a binder and a charge transport material of about 100% to about 40% by weight of a total of the charge transport layer N,N-dimethylphenyl)-4-biphenylamine and about 0% to about 60% N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and wherein the total charge transport material in the composition is 48% or less of the total solids of the composition. The charge transport layer forms a layer of a photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.Type: ApplicationFiled: July 13, 2004Publication date: January 19, 2006Applicant: XEROX CORPORATIONInventors: Yuhua Tong, Kenny-Tuan Dinh, Markus Silvestri, Michael Zak, John Yanus, Min-Hong Fu, David Skinner, Kathleen Carmichael, Colleen Helbig, Dale Renfer, John Bergfjord, Susan Van Dusen
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Publication number: 20050271958Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.Type: ApplicationFiled: August 4, 2005Publication date: December 8, 2005Inventors: Yuhua Tong, Timothy Fuller, Colleen Helbig, Kent Evans, John Yanus, Karen Garland, Paul DeFeo, Anita Lynch, Kathleen Carmichael, Damodar Pai, Dale Renfer, Markus Silvestri
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Publication number: 20050175910Abstract: A photoconductive imaging member containing an optional supporting substrate, an optional hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a phenol of, for example, the alternative formulasType: ApplicationFiled: February 10, 2004Publication date: August 11, 2005Inventors: John Yanus, Kenny-Tuan Dinh, Markus Silvestri, H. Goodbrand, M. Hinckel, Dale Renfer, Yuhua Tong
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Publication number: 20050175914Abstract: A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile.Type: ApplicationFiled: February 9, 2004Publication date: August 11, 2005Inventors: Timothy Fuller, Helen Cherniack, Damodar Pai, Markus Silvestri, John Yanus, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Merlin Scharfe, Steven Sterling
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Publication number: 20050170273Abstract: A photoconductive imaging member containing a supporting substrate, a photogenerating layer, a charge transport layer, and in contact with the charge transport layer a layer comprised of a polymer and a yellow dye of the formulaType: ApplicationFiled: March 25, 2005Publication date: August 4, 2005Inventors: Timothy Fuller, Satchidanand Mishra, John Yanus, Anthony Horgan, Geoffrey Foley, Huoy-Jen Yuh, Dale Renfer, Yuhua Tong, Kenny-Tuan Dinh, Markus Silvestri, John Graham
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Publication number: 20050164104Abstract: A photoconductive imaging member comprised of a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a polymeric solid acid.Type: ApplicationFiled: January 22, 2004Publication date: July 28, 2005Inventors: Yuhua Tong, Satchidanand Mishra, Anthony Horgan, John Yanus, Dale Renfer, Robert Yu, Markus Silvestri, Cindy Chen, Lanhui Zhang
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Publication number: 20040151999Abstract: An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.Type: ApplicationFiled: December 12, 2003Publication date: August 5, 2004Applicant: Xerox CorporationInventors: Satchidanand Mishra, Houy Jen Yuh, Anthony M. Horgan, Markus R. Silvestri, Robert C.U. Yu, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Geoff Foley, Jack Yanus, Timothy Fuller