Patents by Inventor Damodar M. Pai
Damodar M. Pai 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: 7851551Abstract: Disclosed is a process for the preparation of poly(vinylbenzyl alcohol) by, for example the hydrolysis of poly(vinylbenzyl acetate) in the presence of a basic catalyst in an organic solvent.Type: GrantFiled: March 25, 2004Date of Patent: December 14, 2010Assignee: Xerox CorporationInventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Markus R. Silvestri, Kenny-Tuan T Dinh, Yuhua Tong
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Patent number: 7655373Abstract: A method for forming images including a) depositing an electrostatic latent image on a charge retentive surface of a photoreceptor member having a substrate; a charge transport layer with charge transport materials; and an overcoat layer positioned on the charge transport layer, wherein the overcoat layer includes a crosslinkable alcohol-soluble polyamide; and wherein the overcoat layer further includes additives having titanium dioxide, silica, a crosslinking agent, a deletion control agent, and a charge transport molecule; and b) applying a developer material via a development component to the charge-retentive surface to develop the electrostatic latent image to form a developed image on the charge-retentive surface, wherein the developer material comprises emulsion aggregation toner, and further wherein at least one of the additives create a texturized surface on the charge retentive surface thereby reducing the contact area between the emulsion aggregation toners and the charge retentive surface enablingType: GrantFiled: December 14, 2007Date of Patent: February 2, 2010Assignee: Xerox CorporationInventors: Kenny-Tuan T. Dinh, Timothy J. Fuller, Paul J. DeFeo, Damodar M. Pai, John F. Yanus, Linda L. Ferrarese, Cindy C. Chen
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Patent number: 7244485Abstract: A seamed flexible belt having a substrate and a seam having interlocking seam members, wherein the interlocking seam members are held together by an adhesive having polyamide and an optional electrically conductive filler, for use in electrostatographic, contact electrostatic, digital and other like printing machines.Type: GrantFiled: April 11, 2001Date of Patent: July 17, 2007Assignee: Xerox CorporationInventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj
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Patent number: 7226712Abstract: 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: GrantFiled: December 14, 2005Date of Patent: June 5, 2007Assignee: Xerox CorporationInventors: Timothy J. Fuller, Helen R. Cherniack, Damodar M. Pai, Markus R. Silvestri, John F. Yanus, Yuhua Tong, Dale S. Renfer, Kenny-Tuan T. Dinh, Merlin E. Scharfe, Steven M. Sterling
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Patent number: 7205081Abstract: An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating material, an optional charge trapping layer, a crossed linked silicone rubber, and an electrically insulating overcoating layer. The member is first charged with electrostatic charges of a first polarity, charged a second time with electrostatic charges of a polarity opposite to said first polarity in order to substantially neutralize the charges residing on the electrically insulating surface of the member and exposed to an imagewise pattern of activating electromagnetic radiation whereby an electrostatic latent image is formed. The electrostatic latent image may be developed to form a visible image which may be transferred to a receiver member. The imaging member may be reused after erasure and cleaning.Type: GrantFiled: December 14, 2001Date of Patent: April 17, 2007Assignee: Xerox CorporationInventors: Merlin E. Scharfe, Richard L. Schank, William W. Limburg, Damodar M. Pai, Dale S. Renfer, John F. Yanus, Paul J. DeFeo
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Patent number: 7052813Abstract: A charge transport layer for an imaging member comprising a first and second charge transport layer wherein the second charge transport layer comprises a charge transport component, a hindered phenol covalently bonded to a polymer, and an additional polymer binder other than the polymer containing the hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.Type: GrantFiled: August 4, 2005Date of Patent: May 30, 2006Assignee: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
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Patent number: 7049038Abstract: 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: GrantFiled: February 9, 2004Date of Patent: May 23, 2006Assignee: Xerox CorporationInventors: Timothy J. Fuller, Helen R. Cherniack, Damodar M. Pai, Markus R. Silvestri, John F. Yanus, Yuhua Tong, Dale S. Renfer, Kenny-Tuan T. Dinh, Merlin E. Scharfe, Steven M. Sterling
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Patent number: 7022445Abstract: 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: GrantFiled: December 16, 2002Date of Patent: April 4, 2006Assignee: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
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Patent number: 7018756Abstract: A photoconductive imaging member is disclosed comprising a charge generation layer and a charge transport layer comprising an oxidative inhibitor. An electrophotographic imaging process using the imaging member of the invention is also described.Type: GrantFiled: September 5, 2003Date of Patent: March 28, 2006Assignee: Xerox CorporationInventors: Damodar M. Pai, Kent J. Evans, Kathleen M. Carmichael, Colleen A. Helbig, John F. Yanus, Yuhua Tong, Timothy J. Fuller, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch
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Patent number: 6933089Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.Type: GrantFiled: December 16, 2002Date of Patent: August 23, 2005Assignee: Xerox CorporationInventors: Anthony M. Horgan, Satchidanand Mishra, Robert C. U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland
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Patent number: 6780554Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.Type: GrantFiled: December 16, 2002Date of Patent: August 24, 2004Assignee: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai
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Patent number: 6761978Abstract: An adhesive having polyamide and an electrically conductive filler dispersed or contained therein, for use in bonding components of electrostatographic, contact electrostatic, digital and other like printing machines.Type: GrantFiled: April 11, 2001Date of Patent: July 13, 2004Assignee: Xerox CorporationInventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj
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Patent number: 6759125Abstract: A coated transport roll comprised of a core with a coating comprised of a charge transporting polymer and an oxidizing agent.Type: GrantFiled: October 7, 1994Date of Patent: July 6, 2004Assignee: Xerox CorporationInventors: Dan A. Hays, Joseph Mammino, Damodar M. Pai, Donald S. Sypula, William H. Wayman, John F. Yanus, Paul J. DeFeo
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Publication number: 20040115545Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Applicant: Xerox CorporationInventors: Anthony M. Horgan, Satchidanand Mishra, Robert C.U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland
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Publication number: 20040115547Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol.Type: ApplicationFiled: December 16, 2002Publication date: June 17, 2004Applicant: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai
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Publication number: 20040115546Abstract: 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: December 16, 2002Publication date: June 17, 2004Applicant: Xerox CorporationInventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
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Patent number: 6669850Abstract: A purification process composed of: contacting a contaminated composition including an optional fluid, a polymer, and an impurity with an adsorbent composition including an adsorbent, wherein the adsorbent is selected from the group consisting of an alumina and a magnesium sulfate, wherein a portion of the impurity binds to the adsorbent, wherein the polymer is a polycarbonate, a carbazole, a polyarylate, or a copolyester having the formula where n is the degree of polymerization.Type: GrantFiled: August 25, 1999Date of Patent: December 30, 2003Assignee: Xerox CorporationInventors: Timothy J. Fuller, John F. Yanus, Markus R. Silvestri, Damodar M. Pai, Samuel Kaplan, Raymond K. Crandall, Kathleen M. Carmichael, David J. Maty
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Publication number: 20030113646Abstract: An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating material, an optional charge trapping layer, a crossed linked silicone rubber, and an electrically insulating overcoating layer. The member is first charged with electrostatic charges of a first polarity, charged a second time with electrostatic charges of a polarity opposite to said first polarity in order to substantially neutralize the charges residing on the electrically insulating surface of the member and exposed to an imagewise pattern of activating electromagnetic radiation whereby an electrostatic latent image is formed. The electrostatic latent image may be developed to form a visible image which may be transferred to a receiver member. The imaging member may be reused after erasure and cleaning.Type: ApplicationFiled: December 14, 2001Publication date: June 19, 2003Applicant: Xerox CorporationInventors: Merlin E. Scharfe, Richard L. Schank, William W. Limburg, Damodar M. Pai, Dale S. Renfer, John F. Yanus, Paul J. DeFeo
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Publication number: 20020177645Abstract: An adhesive having polyamide and an electrically conductive filler dispersed or contained therein, for use in bonding components of electrostatographic, contact electrostatic, digital and other like printing machines.Type: ApplicationFiled: April 11, 2001Publication date: November 28, 2002Applicant: Xerox CorporationInventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silverstri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj
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Publication number: 20020150408Abstract: A seamed flexible belt having a substrate and a seam having interlocking seam members, wherein the interlocking seam members are held together by an adhesive having polyamide and an optional electrically conductive filler, for use in electrostatographic, contact electrostatic, digital and other like printing machines.Type: ApplicationFiled: April 11, 2001Publication date: October 17, 2002Applicant: Xerox CorporationInventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj